http://www.cancertutor.com/Other02/CheckFast.html
Treating Stage IV Cancer Patients
by R. Webster Kehr
Independent Cancer Research Foundation, Inc.
Note: This article in Russian: Click Here
Important Notes
Note #1:
Read this article at least once a month. Stage IV cancer is where almost all of the research of the Independent Cancer Research Foundation, Inc. is focused and the owner of Cancer Tutor is a member of the Board of Directors of the ICRF. Developments will hit this web page faster than other single page on the Internet.
Note #2:
Read this article in its entirety AT LEAST TWICE, even if you think you have found your answer. There will be several important sections in this article that apply to your situation!!
Note #3:
NOTE: For those on a very limited budget, also see this article on inexpensive cancer treatments:
Inexpensive Cancer Treatments
Note #4:
For those women who are pregnant, who may be pregnant or who may become pregnant, it is very important to read this article:
Article Regarding Pregnancy and Cancer
Note #5: How to Search This Website
When you need more information about a particular product or situation (such as a type of cancer), it is easy to search this website. As an example, suppose you want to search for the pages that mention germanium. Just type this into the Google search engine:
site:www.cancertutor.com germanium
Or suppose you want to search for articles that mention lung cancer. In this case you have to use double quotes, thusly:
site:www.cancertutor.com "lung cancer"
About This Article
The first two years I was researching alternative cancer treatments, I did not fully understand that some alternative cancer treatments were FAR STRONGER than other alternative cancer treatments.
It actually came as a shock to me that some alternative cancer treatments were simply not strong enough for some situations that advanced cancer patients were facing.
Armed with that revelation, I started to research which of the alternative cancer treatments were strong enough for almost any cancer patient. It was this research which led to this article and the "ranking" of the strengh of alternative cancer treatments on this unique website.
I also learned that "testimonials" need to be understood in context. For example, a testimonial for a newly diagnosed liver cancer patient, who had been cured with carrot juice and a strong cancer diet (i.e. the "cancer diet" is a list of the foods which are allowed and are NOT allowed during treatment) may not be strong enough for an advanced cancer patient and may even inadvertently mislead an advanced cancer patient into using a treatment which was not strong enough for their situation.
The point is that for advanced cancer patients, a completely different and complex set of concepts, attitudes and treatments must be used to treat their cancer to give them signficant hope for survival.
At any given time the Independent Cancer Research Foundation, Inc. is researching several alternative cancer treatments. It is critical to check back with this article from time to time to see if any new treatments qualify as "Stage IV" alternative cancer treatments (or see the home page of this website to see if there are any new "Stage IV" treatments.
This article for advanced cancer patients, over time, grew to such a size it has been broken down into "Chapters." There was simply no other way to deal with the massive size of this article due to the vast number of issues which advanced cancer patients must understand.
Before the link to each chapter, there will be a brief explanation of the chapter.
Chapter 1 - Introduction to Treating Advanced Cancer
This chapter is the "Big Picture" of dealing with advanced cancer. It provides the overview of what the patient needs to understand about treating cancer.
Introduction to Treating Advanced Cancer
Chapter 2 - The Key Issues of Treating Advanced Cancer
This chapter digs a little deeper than the prior chapter and gets more specific about what an alternative cancer treatment needs to do.
The Key Issues of Treating Advanced Cancer
Chapter 3 - For Those on Prescription Drugs
This is a critical chapter for those who are using alternative cancer treatments and prescription drugs, such as chemotherapy or pain killers or even radiation. There are many conflicts between these two types of treatments.
For Those Using Prescription Drugs
Chapter 4 - The Cardinal Rules
Going into even more depth, and even discussing specific supplements to accomplish specific tasks, this chapter details the "Cardinal Rules" an advanced patient needs to understand. For example, one cardinal rule explains how to determine whether your alternative cancer treatment is working or not. This chapter is the first of the very critical cancer treatment chapters!!
The Cardinal Rules
Chapter 5 - The Stage IV Treatments
This chapter is a listing, with detailed comments, of the "Stage IV" alternative cancer treatments. These are the crown jewels of alternative cancer treatments for advanced cancer patients.
The Stage IV Treatments
Chapter 6 - Special Situations
This is a critical chapter for almost all advanced cancer patients. This article discusses dealing with special situations, such as very fast spreading cancers, dealing with pain, dealing with tumors, etc.
Special Situations
Chapter 7 - The "Type of Cancer" Articles
This chapter offers specific suggestions for dealing with specific types of cancer, such as lung cancer, brain cancer, etc.
The "Type of Cancer" Articles
Chapter 8 - Other Supplements and Devices
Generally speaking, "Stage IV" cancer treatments are too strong to be combined with each other because you do not want to kill too many cancer cells too fast. This chapter lists a number of treatments and devices which can compliment the Stage IV treatments without killing too many cancer cells too fast.
Other Supplements and Devices
Please Support Alternative Cancer Research:
The Cancer Tutor website is closely affiliated with the Independent Cancer Research Foundation, Inc (ICRF). The ICRF is one of the premiere alternative cancer treatment research organizations. Please support their research:
Independent Cancer Research Foundation, Inc.
Please email your friends about this site, and link to this site on your web page!
Click here to read the FDA required disclaimer:
FDA Required Disclaimer and Discussion of Key Terms
Click here to read about the CancerTutor webmaster:
About R. Webster Kehr
Sunday, August 9, 2009
Thursday, July 2, 2009
What is Cancer? What Causes Cancer?
http://www.medicalnewstoday.com/info/cancer-oncology/whatiscancer.php
What is Cancer? What Causes Cancer?
Cancer is a class of diseases characterized by out-of-control cell growth. There are over 100 different types of cancer, and each is classified by the type of cell that is initially affected.
Cancer harms the body when damaged cells divide uncontrollably to form lumps or masses of tissue called tumors (except in the case of leukemia where cancer prohibits normal blood function by abnormal cell division in the blood stream). Tumors can grow and interfere with the digestive, nervous, and circulatory systems, and they can release hormones that alter body function. Tumors that stay in one spot and demonstrate limited growth are generally considered to be benign.
More dangerous, or malignant, tumors form when two things occur:
a cancerous cell manages to move throughout the body using the blood or lymph systems, destroying healthy tissue in a process called invasion
that cell manages to divide and grow, making new blood vessels to feed itself in a process called angiogenesis.
When a tumor successfully spreads to other parts of the body and grows, invading and destroying other healthy tissues, it is said to have metastasized. This process itself is called metastasis, and the result is a serious condition that is very difficult to treat.
In 2007, cancer claimed the lives of about 7.6 million people in the world. Physicians and researchers who specialize in the study, diagnosis, treatment, and prevention of cancer are called oncologists.
What causes cancer?
Cancer is ultimately the result of cells that uncontrollably grow and do not die. Normal cells in the body follow an orderly path of growth, division, and death. Programmed cell death is called apoptosis, and when this process breaks down, cancer begins to form. Unlike regular cells, cancer cells do not experience programmatic death and instead continue to grow and divide. This leads to a mass of abnormal cells that grows out of control.
What is cancer? - Video
A short, 3D, animated introduction to cancer. This was originally created by BioDigital Systems and used in the Stand Up 2 Cancer telethon.
Genes - the DNA type
Cells can experience uncontrolled growth if there are damages or mutations to DNA, and therefore, damage to the genes involved in cell division. Four key types of gene are responsible for the cell division process: oncogenes tell cells when to divide, tumor suppressor genes tell cells when not to divide, suicide genes control apoptosis and tell the cell to kill itself if something goes wrong, and DNA-repair genes instruct a cell to repair damaged DNA.
Cancer occurs when a cell's gene mutations make the cell unable to correct DNA damage and unable to commit suicide. Similarly, cancer is a result of mutations that inhibit oncogene and tumor suppressor gene function, leading to uncontrollable cell growth.
Carcinogens
Carcinogens are a class of substances that are directly responsible for damaging DNA, promoting or aiding cancer. Tobacco, asbestos, arsenic, radiation such as gamma and x-rays, the sun, and compounds in car exhaust fumes are all examples of carcinogens. When our bodies are exposed to carcinogens, free radicals are formed that try to steal electrons from other molecules in the body. Theses free radicals damage cells and affect their ability to function normally.
Genes - the family type
Cancer can be the result of a genetic predisposition that is inherited from family members. It is possible to be born with certain genetic mutations or a fault in a gene that makes one statistically more likely to develop cancer later in life.
Other medical factors
As we age, there is an increase in the number of possible cancer-causing mutations in our DNA. This makes age an important risk factor for cancer. Several viruses have also been linked to cancer such as: human papillomavirus (a cause of cervical cancer), hepatitis B and C (causes of liver cancer), and Epstein-Barr virus (a cause of some childhood cancers). Human immunodeficiency virus (HIV) - and anything else that suppresses or weakens the immune system - inhibits the body's ability to fight infections and increases the chance of developing cancer.
What are the symptoms of cancer?
Cancer symptoms are quite varied and depend on where the cancer is located, where it has spread, and how big the tumor is. Some cancers can be felt or seen through the skin - a lump on the breast or testicle can be an indicator of cancer in those locations. Skin cancer (melanoma) is often noted by a change in a wart or mole on the skin. Some oral cancers present white patches inside the mouth or white spots on the tongue.
Other cancers have symptoms that are less physically apparent. Some brain tumors tend to present symptoms early in the disease as they affect important cognitive functions. Pancreas cancers are usually too small to cause symptoms until they cause pain by pushing against nearby nerves or interfere with liver function to cause a yellowing of the skin and eyes called jaundice. Symptoms also can be created as a tumor grows and pushes against organs and blood vessels. For example, colon cancers lead to symptoms such as constipation, diarrhea, and changes in stool size. Bladder or prostate cancers cause changes in bladder function such as more frequent or infrequent urination.
As cancer cells use the body's energy and interfere with normal hormone function, it is possible to present symptoms such as fever, fatigue, excessive sweating, anemia, and unexplained weight loss. However, these symptoms are common in several other maladies as well. For example, coughing and hoarseness can point to lung or throat cancer as well as several other conditions.
When cancer spreads, or metastasizes, additional symptoms can present themselves in the newly affected area. Swollen or enlarged lymph nodes are common and likely to be present early. If cancer spreads to the brain, patients may experience vertigo, headaches, or seizures. Spreading to the lungs may cause coughing and shortness of breath. In addition, the liver may become enlarged and cause jaundice and bones can become painful, brittle, and break easily. Symptoms of metastasis ultimately depend on the location to which the cancer has spread.
How is cancer classified?
There are five broad groups that are used to classify cancer.
Carcinomas are characterized by cells that cover internal and external parts of the body such as lung, breast, and colon cancer.
Sarcomas are characterized by cells that are located in bone, cartilage, fat, connective tissue, muscle, and other supportive tissues.
Lymphomas are cancers that begin in the lymph nodes and immune system tissues.
Leukemias are cancers that begin in the bone marrow and often accumulate in the bloodstream.
Adenomas are cancers that arise in the thyroid, the pituitary gland, the adrenal gland, and other glandular tissues.
Cancers are often referred to by terms that contain a prefix related to the cell type in which the cancer originated and a suffix such as -sarcoma, -carcinoma, or just -oma. Common prefixes include:
Adeno- = gland
Chondro- = cartilage
Erythro- = red blood cell
Hemangio- = blood vessels
Hepato- = liver
Lipo- = fat
Lympho- = white blood cell
Melano- = pigment cell
Myelo- = bone marrow
Myo- = muscle
Osteo- = bone
Uro- = bladder
Retino- = eye
Neuro- = brain
How is cancer diagnosed and staged?
Early detection of cancer can greatly improve the odds of successful treatment and survival. Physicians use information from symptoms and several other procedures to diagnose cancer. Imaging techniques such as X-rays, CT scans, MRI scans, PET scans, and ultrasound scans are used regularly in order to detect where a tumor is located and what organs may be affected by it. Doctors may also conduct an endoscopy, which is a procedure that uses a thin tube with a camera and light at one end, to look for abnormalities inside the body.
Extracting cancer cells and looking at them under a microscope is the only absolute way to diagnose cancer. This procedure is called a biopsy. Other types of molecular diagnostic tests are frequently employed as well. Physicians will analyze your body's sugars, fats, proteins, and DNA at the molecular level. For example, cancerous prostate cells release a higher level of a chemical called PSA (prostate-specific antigen) into the bloodstream that can be detected by a blood test. Molecular diagnostics, biopsies, and imaging techniques are all used together to diagnose cancer.
After a diagnosis is made, doctors find out how far the cancer has spread and determine the stage of the cancer. The stage determines which choices will be available for treatment and informs prognoses. The most common cancer staging method is called the TNM system. T (1-4) indicates the size and direct extent of the primary tumor, N (0-3) indicates the degree to which the cancer has spread to nearby lymph nodes, and M (0-1) indicates whether the cancer has metastasized to other organs in the body. A small tumor that has not spread to lymph nodes or distant organs may be staged as (T1, N0, M0), for example.
TNM descriptions then lead to a simpler categorization of stages, from 0 to 4, where lower numbers indicate that the cancer has spread less. While most Stage 1 tumors are curable, most Stage 4 tumors are inoperable or untreatable.
How is cancer treated?
Cancer treatment depends on the type of cancer, the stage of the cancer (how much it has spread), age, health status, and additional personal characteristics. There is no single treatment for cancer, and patients often receive a combination of therapies and palliative care. Treatments usually fall into one of the following categories: surgery, radiation, chemotherapy, immunotherapy, hormone therapy, or gene therapy.
Surgery
Surgery is the oldest known treatment for cancer. If a cancer has not metastasized, it is possible to completely cure a patient by surgically removing the cancer from the body. This is often seen in the removal of the prostate or a breast or testicle. After the disease has spread, however, it is nearly impossible to remove all of the cancer cells. Surgery may also be instrumental in helping to control symptoms such as bowel obstruction or spinal cord compression.
Radiation
Radiation treatment, also known as radiotherapy, destroys cancer by focusing high-energy rays on the cancer cells. This causes damage to the molecules that make up the cancer cells and leads them to commit suicide. Radiotherapy utilizes high-energy gamma-rays that are emitted from metals such as radium or high-energy x-rays that are created in a special machine. Early radiation treatments caused severe side-effects because the energy beams would damage normal, healthy tissue, but technologies have improved so that beams can be more accurately targeted. Radiotherapy is used as a standalone treatment to shrink a tumor or destroy cancer cells (including those associated with leukemia and lymphoma), and it is also used in combination with other cancer treatments.
Chemotherapy
Chemotherapy utilizes chemicals that interfere with the cell division process - damaging proteins or DNA - so that cancer cells will commit suicide. These treatments target any rapidly dividing cells (not necessarily just cancer cells), but normal cells usually can recover from any chemical-induced damage while cancer cells cannot. Chemotherapy is generally used to treat cancer that has spread or metastasized because the medicines travel throughout the entire body. It is a necessary treatment for some forms of leukemia and lymphoma. Chemotherapy treatment occurs in cycles so the body has time to heal between doses. However, there are still common side effects such as hair loss, nausea, fatigue, and vomiting. Combination therapies often include multiple types of chemotherapy or chemotherapy combined with other treatment options.
Immunotherapy
Immunotherapy aims to get the body's immune system to fight the tumor. Local immunotherapy injects a treatment into an affected area, for example, to cause inflammation that causes a tumor to shrink. Systemic immunotherapy treats the whole body by administering an agent such as the protein interferon alpha that can shrink tumors. Immunotherapy can also be considered non-specific if it improves cancer-fighting abilities by stimulating the entire immune system, and it can be considered targeted if the treatment specifically tells the immune system to destroy cancer cells. These therapies are relatively young, but researchers have had success with treatments that introduce antibodies to the body that inhibit the growth of breast cancer cells. Bone marrow transplantation (hematopoetic stem cell transplantation) can also be considered immunotherapy because the donor's immune cells will often attack the tumor or cancer cells that are present in the host.
Hormone therapy
Several cancers have been linked to some types of hormones, most notably breast and prostate cancer. Hormone therapy is designed to alter hormone production in the body so that cancer cells stop growing or are killed completely. Breast cancer hormone therapies often focus on reducing estrogen levels (a common drug for this is tamoxifen) and prostate cancer hormone therapies often focus on reducing testosterone levels. In addition, some leukemia and lymphoma cases can be treated with the hormone cortisone.
Gene therapy
The goal of gene therapy is to replace damaged genes with ones that work to address a root cause of cancer: damage to DNA. For example, researchers are trying to replace the damaged gene that signals cells to stop dividing (the p53 gene) with a copy of a working gene. Other gene-based therapies focus on further damaging cancer cell DNA to the point where the cell commits suicide. Gene therapy is a very young field and has not yet resulted in any successful treatments.
How can cancer be prevented?
Cancers that are closely linked to certain behaviors are the easiest to prevent. For example, choosing not to smoke tobacco or drink alcohol significantly lower the risk of several types of cancer - most notably lung, throat, mouth, and liver cancer. Even if you are a current tobacco user, quitting can still greatly reduce your chances of getting cancer.
Skin cancer can be prevented by staying in the shade, protecting yourself with a hat and shirt when in the sun, and using sunscreen. Diet is also an important part of cancer prevention since what we eat has been linked to the disease. Physicians recommend diets that are low in fat and rich in fresh fruits and vegetables and whole grains.
Certain vaccinations have been associated with the prevention of some cancers. For example, many women receive a vaccination for the human papillomavirus because of the virus's relationship with cervical cancer. Hepatitis B vaccines prevent the hepatitis B virus, which can cause liver cancer.
Some cancer prevention is based on systematic screening in order to detect small irregularities or tumors as early as possible even if there are no clear symptoms present. Breast self-examination, mammograms, testicular self-examination, and Pap smears are common screening methods for various cancers.
How to eat to prevent cancer - Video
A guide to some everyday foods that contain nutrients that may help reduce your risk of getting cancer. Video by Howcast.
Cancer / Oncology news
Medical News Today is a leading resource for the latest headlines on Cancer and Oncology. So, check out our cancer news section. You can also sign up to daily medical news alerts or our weekly digest medical newsletters to ensure that you stay up-to-date with the latest news.
This what is cancer? information section was written by Peter Crosta for Medical News Today, and may not be re-produced in any way without the permission of Medical News Today.
Sources of information:
American Cancer Society
Cancer Research, UK
Wikipedia
Further information
Useful Cancer Website Links
Disclaimer: This guide is provided for general information purposes only. The materials contained within this guide do not constitute medical or pharmaceutical advice, which should be sought from qualified medical and pharmaceutical advisers. Full disclaimer.
© MediLexicon International Ltd
What is Cancer? What Causes Cancer?
Cancer is a class of diseases characterized by out-of-control cell growth. There are over 100 different types of cancer, and each is classified by the type of cell that is initially affected.
Cancer harms the body when damaged cells divide uncontrollably to form lumps or masses of tissue called tumors (except in the case of leukemia where cancer prohibits normal blood function by abnormal cell division in the blood stream). Tumors can grow and interfere with the digestive, nervous, and circulatory systems, and they can release hormones that alter body function. Tumors that stay in one spot and demonstrate limited growth are generally considered to be benign.
More dangerous, or malignant, tumors form when two things occur:
a cancerous cell manages to move throughout the body using the blood or lymph systems, destroying healthy tissue in a process called invasion
that cell manages to divide and grow, making new blood vessels to feed itself in a process called angiogenesis.
When a tumor successfully spreads to other parts of the body and grows, invading and destroying other healthy tissues, it is said to have metastasized. This process itself is called metastasis, and the result is a serious condition that is very difficult to treat.
In 2007, cancer claimed the lives of about 7.6 million people in the world. Physicians and researchers who specialize in the study, diagnosis, treatment, and prevention of cancer are called oncologists.
What causes cancer?
Cancer is ultimately the result of cells that uncontrollably grow and do not die. Normal cells in the body follow an orderly path of growth, division, and death. Programmed cell death is called apoptosis, and when this process breaks down, cancer begins to form. Unlike regular cells, cancer cells do not experience programmatic death and instead continue to grow and divide. This leads to a mass of abnormal cells that grows out of control.
What is cancer? - Video
A short, 3D, animated introduction to cancer. This was originally created by BioDigital Systems and used in the Stand Up 2 Cancer telethon.
Genes - the DNA type
Cells can experience uncontrolled growth if there are damages or mutations to DNA, and therefore, damage to the genes involved in cell division. Four key types of gene are responsible for the cell division process: oncogenes tell cells when to divide, tumor suppressor genes tell cells when not to divide, suicide genes control apoptosis and tell the cell to kill itself if something goes wrong, and DNA-repair genes instruct a cell to repair damaged DNA.
Cancer occurs when a cell's gene mutations make the cell unable to correct DNA damage and unable to commit suicide. Similarly, cancer is a result of mutations that inhibit oncogene and tumor suppressor gene function, leading to uncontrollable cell growth.
Carcinogens
Carcinogens are a class of substances that are directly responsible for damaging DNA, promoting or aiding cancer. Tobacco, asbestos, arsenic, radiation such as gamma and x-rays, the sun, and compounds in car exhaust fumes are all examples of carcinogens. When our bodies are exposed to carcinogens, free radicals are formed that try to steal electrons from other molecules in the body. Theses free radicals damage cells and affect their ability to function normally.
Genes - the family type
Cancer can be the result of a genetic predisposition that is inherited from family members. It is possible to be born with certain genetic mutations or a fault in a gene that makes one statistically more likely to develop cancer later in life.
Other medical factors
As we age, there is an increase in the number of possible cancer-causing mutations in our DNA. This makes age an important risk factor for cancer. Several viruses have also been linked to cancer such as: human papillomavirus (a cause of cervical cancer), hepatitis B and C (causes of liver cancer), and Epstein-Barr virus (a cause of some childhood cancers). Human immunodeficiency virus (HIV) - and anything else that suppresses or weakens the immune system - inhibits the body's ability to fight infections and increases the chance of developing cancer.
What are the symptoms of cancer?
Cancer symptoms are quite varied and depend on where the cancer is located, where it has spread, and how big the tumor is. Some cancers can be felt or seen through the skin - a lump on the breast or testicle can be an indicator of cancer in those locations. Skin cancer (melanoma) is often noted by a change in a wart or mole on the skin. Some oral cancers present white patches inside the mouth or white spots on the tongue.
Other cancers have symptoms that are less physically apparent. Some brain tumors tend to present symptoms early in the disease as they affect important cognitive functions. Pancreas cancers are usually too small to cause symptoms until they cause pain by pushing against nearby nerves or interfere with liver function to cause a yellowing of the skin and eyes called jaundice. Symptoms also can be created as a tumor grows and pushes against organs and blood vessels. For example, colon cancers lead to symptoms such as constipation, diarrhea, and changes in stool size. Bladder or prostate cancers cause changes in bladder function such as more frequent or infrequent urination.
As cancer cells use the body's energy and interfere with normal hormone function, it is possible to present symptoms such as fever, fatigue, excessive sweating, anemia, and unexplained weight loss. However, these symptoms are common in several other maladies as well. For example, coughing and hoarseness can point to lung or throat cancer as well as several other conditions.
When cancer spreads, or metastasizes, additional symptoms can present themselves in the newly affected area. Swollen or enlarged lymph nodes are common and likely to be present early. If cancer spreads to the brain, patients may experience vertigo, headaches, or seizures. Spreading to the lungs may cause coughing and shortness of breath. In addition, the liver may become enlarged and cause jaundice and bones can become painful, brittle, and break easily. Symptoms of metastasis ultimately depend on the location to which the cancer has spread.
How is cancer classified?
There are five broad groups that are used to classify cancer.
Carcinomas are characterized by cells that cover internal and external parts of the body such as lung, breast, and colon cancer.
Sarcomas are characterized by cells that are located in bone, cartilage, fat, connective tissue, muscle, and other supportive tissues.
Lymphomas are cancers that begin in the lymph nodes and immune system tissues.
Leukemias are cancers that begin in the bone marrow and often accumulate in the bloodstream.
Adenomas are cancers that arise in the thyroid, the pituitary gland, the adrenal gland, and other glandular tissues.
Cancers are often referred to by terms that contain a prefix related to the cell type in which the cancer originated and a suffix such as -sarcoma, -carcinoma, or just -oma. Common prefixes include:
Adeno- = gland
Chondro- = cartilage
Erythro- = red blood cell
Hemangio- = blood vessels
Hepato- = liver
Lipo- = fat
Lympho- = white blood cell
Melano- = pigment cell
Myelo- = bone marrow
Myo- = muscle
Osteo- = bone
Uro- = bladder
Retino- = eye
Neuro- = brain
How is cancer diagnosed and staged?
Early detection of cancer can greatly improve the odds of successful treatment and survival. Physicians use information from symptoms and several other procedures to diagnose cancer. Imaging techniques such as X-rays, CT scans, MRI scans, PET scans, and ultrasound scans are used regularly in order to detect where a tumor is located and what organs may be affected by it. Doctors may also conduct an endoscopy, which is a procedure that uses a thin tube with a camera and light at one end, to look for abnormalities inside the body.
Extracting cancer cells and looking at them under a microscope is the only absolute way to diagnose cancer. This procedure is called a biopsy. Other types of molecular diagnostic tests are frequently employed as well. Physicians will analyze your body's sugars, fats, proteins, and DNA at the molecular level. For example, cancerous prostate cells release a higher level of a chemical called PSA (prostate-specific antigen) into the bloodstream that can be detected by a blood test. Molecular diagnostics, biopsies, and imaging techniques are all used together to diagnose cancer.
After a diagnosis is made, doctors find out how far the cancer has spread and determine the stage of the cancer. The stage determines which choices will be available for treatment and informs prognoses. The most common cancer staging method is called the TNM system. T (1-4) indicates the size and direct extent of the primary tumor, N (0-3) indicates the degree to which the cancer has spread to nearby lymph nodes, and M (0-1) indicates whether the cancer has metastasized to other organs in the body. A small tumor that has not spread to lymph nodes or distant organs may be staged as (T1, N0, M0), for example.
TNM descriptions then lead to a simpler categorization of stages, from 0 to 4, where lower numbers indicate that the cancer has spread less. While most Stage 1 tumors are curable, most Stage 4 tumors are inoperable or untreatable.
How is cancer treated?
Cancer treatment depends on the type of cancer, the stage of the cancer (how much it has spread), age, health status, and additional personal characteristics. There is no single treatment for cancer, and patients often receive a combination of therapies and palliative care. Treatments usually fall into one of the following categories: surgery, radiation, chemotherapy, immunotherapy, hormone therapy, or gene therapy.
Surgery
Surgery is the oldest known treatment for cancer. If a cancer has not metastasized, it is possible to completely cure a patient by surgically removing the cancer from the body. This is often seen in the removal of the prostate or a breast or testicle. After the disease has spread, however, it is nearly impossible to remove all of the cancer cells. Surgery may also be instrumental in helping to control symptoms such as bowel obstruction or spinal cord compression.
Radiation
Radiation treatment, also known as radiotherapy, destroys cancer by focusing high-energy rays on the cancer cells. This causes damage to the molecules that make up the cancer cells and leads them to commit suicide. Radiotherapy utilizes high-energy gamma-rays that are emitted from metals such as radium or high-energy x-rays that are created in a special machine. Early radiation treatments caused severe side-effects because the energy beams would damage normal, healthy tissue, but technologies have improved so that beams can be more accurately targeted. Radiotherapy is used as a standalone treatment to shrink a tumor or destroy cancer cells (including those associated with leukemia and lymphoma), and it is also used in combination with other cancer treatments.
Chemotherapy
Chemotherapy utilizes chemicals that interfere with the cell division process - damaging proteins or DNA - so that cancer cells will commit suicide. These treatments target any rapidly dividing cells (not necessarily just cancer cells), but normal cells usually can recover from any chemical-induced damage while cancer cells cannot. Chemotherapy is generally used to treat cancer that has spread or metastasized because the medicines travel throughout the entire body. It is a necessary treatment for some forms of leukemia and lymphoma. Chemotherapy treatment occurs in cycles so the body has time to heal between doses. However, there are still common side effects such as hair loss, nausea, fatigue, and vomiting. Combination therapies often include multiple types of chemotherapy or chemotherapy combined with other treatment options.
Immunotherapy
Immunotherapy aims to get the body's immune system to fight the tumor. Local immunotherapy injects a treatment into an affected area, for example, to cause inflammation that causes a tumor to shrink. Systemic immunotherapy treats the whole body by administering an agent such as the protein interferon alpha that can shrink tumors. Immunotherapy can also be considered non-specific if it improves cancer-fighting abilities by stimulating the entire immune system, and it can be considered targeted if the treatment specifically tells the immune system to destroy cancer cells. These therapies are relatively young, but researchers have had success with treatments that introduce antibodies to the body that inhibit the growth of breast cancer cells. Bone marrow transplantation (hematopoetic stem cell transplantation) can also be considered immunotherapy because the donor's immune cells will often attack the tumor or cancer cells that are present in the host.
Hormone therapy
Several cancers have been linked to some types of hormones, most notably breast and prostate cancer. Hormone therapy is designed to alter hormone production in the body so that cancer cells stop growing or are killed completely. Breast cancer hormone therapies often focus on reducing estrogen levels (a common drug for this is tamoxifen) and prostate cancer hormone therapies often focus on reducing testosterone levels. In addition, some leukemia and lymphoma cases can be treated with the hormone cortisone.
Gene therapy
The goal of gene therapy is to replace damaged genes with ones that work to address a root cause of cancer: damage to DNA. For example, researchers are trying to replace the damaged gene that signals cells to stop dividing (the p53 gene) with a copy of a working gene. Other gene-based therapies focus on further damaging cancer cell DNA to the point where the cell commits suicide. Gene therapy is a very young field and has not yet resulted in any successful treatments.
How can cancer be prevented?
Cancers that are closely linked to certain behaviors are the easiest to prevent. For example, choosing not to smoke tobacco or drink alcohol significantly lower the risk of several types of cancer - most notably lung, throat, mouth, and liver cancer. Even if you are a current tobacco user, quitting can still greatly reduce your chances of getting cancer.
Skin cancer can be prevented by staying in the shade, protecting yourself with a hat and shirt when in the sun, and using sunscreen. Diet is also an important part of cancer prevention since what we eat has been linked to the disease. Physicians recommend diets that are low in fat and rich in fresh fruits and vegetables and whole grains.
Certain vaccinations have been associated with the prevention of some cancers. For example, many women receive a vaccination for the human papillomavirus because of the virus's relationship with cervical cancer. Hepatitis B vaccines prevent the hepatitis B virus, which can cause liver cancer.
Some cancer prevention is based on systematic screening in order to detect small irregularities or tumors as early as possible even if there are no clear symptoms present. Breast self-examination, mammograms, testicular self-examination, and Pap smears are common screening methods for various cancers.
How to eat to prevent cancer - Video
A guide to some everyday foods that contain nutrients that may help reduce your risk of getting cancer. Video by Howcast.
Cancer / Oncology news
Medical News Today is a leading resource for the latest headlines on Cancer and Oncology. So, check out our cancer news section. You can also sign up to daily medical news alerts or our weekly digest medical newsletters to ensure that you stay up-to-date with the latest news.
This what is cancer? information section was written by Peter Crosta for Medical News Today, and may not be re-produced in any way without the permission of Medical News Today.
Sources of information:
American Cancer Society
Cancer Research, UK
Wikipedia
Further information
Useful Cancer Website Links
Disclaimer: This guide is provided for general information purposes only. The materials contained within this guide do not constitute medical or pharmaceutical advice, which should be sought from qualified medical and pharmaceutical advisers. Full disclaimer.
© MediLexicon International Ltd
Tuesday, June 30, 2009
Foods for Long Life and Well-Being
Foods for Long Life and Well-Being
Best Healthy Diet Snacks Slideshow
The time to start eating them is now
By Carol Sorgen
WebMD Weight Loss Clinic - Feature
Reviewed By Kathleen Zelman, MPH, RD/LD
If you've made it this far in life, chances are strong that you may live into your 80s or even 90s. But will you be living well?
"We probably can't extend life much beyond what we already have done," says William Hart, PhD, MPH, associate professor of nutrition and dietetics at the St. Louis University Doisy School of Allied Health Professions. "But we can help make those last five to 10 years of life more enjoyable. Living longer isn't much fun if you're not healthy enough to enjoy it."
So what's the secret to staying healthy as you get older? Exercise, of course. Also, the right food. To get started, add these five nutrients to your diet.
Soy to Manage Your Cholesterol
"No, adding soy to your diet does not mean pouring more soy sauce on your Chinese food," says Leslie Bonci, MPH, RD, LDN, director of sports nutrition at the University of Pittsburgh Medical Center. It does mean adding soy foods such as tofu, soy milk, soy nuts, or the green soybeans called edamame by the Japanese.
Soy has an impressive resume, along with some inevitable controversy. Adding soy to your diet has been shown to significantly lower cholesterol, which can reduce your risk of heart disease. Plus, soy is high in iron, which many women need. Some women also say that soy helps them manage hot flashes and other symptoms of menopause, although those benefits have not been proven by long-term clinical studies.
Still, its cholesterol-lowering benefits are powerful enough. Indeed, the right diet can lower cholesterol as much as medication, according to a study reported July 2003 in The Journal of the American Medical Association. That four-week study found that a diet of soy fiber, protein from oats and barley, almonds, and margarine from plant sterols lowered cholesterol as much as statins, the most widely prescribed cholesterol medicine. Soybeans themselves provide high-quality protein, are low in saturated fat, and contain no cholesterol, making them an ideal heart-healthy food. To lower your cholesterol, the American Heart Association suggests you look for products that provide 10 grams of soy protein per serving, and try to eat three or more servings per day.
Fiber for Your Whole Body
Once upon a time our diet was made up mostly of whole foods loaded with fiber. While we may have fallen to a wild beast or infection, fiber helped keep our cholesterol and blood sugar levels low, and kept our bowels functioning smoothly.
Now in our frenzied lifestyle, we're more likely to grab fast food, or use prepared foods at home that have only a passing acquaintance with dietary fiber. It's a little known fact: Most of us should double the amount of fiber we eat if we want to reap its benefits.
"I don't think it would be a bad idea to flip the food pyramid and suggest 9-11 servings of fruits and vegetables a day instead of the 5-7 we recommend now," says William Hart. "None of us eats enough fiber." The average American eats 12 grams of fiber a day; most health organizations recommend 20 to 35 grams.
Studies have shown that dietary fiber - including foods such as apples, barley, beans and other legumes, fruits and vegetables, oatmeal, oat bran and brown rice -- clearly lower blood cholesterol. High-fiber foods are also digested more slowly, so they don't cause spikes in blood sugar levels like white bread, potatoes and sweets do. Of course, everyone knows that fiber helps keep you regular, but so do laxatives. Fiber, however, has an added plus: High-fiber foods help us feel full, making it easier to control weight.
You get more nutritional "bang for your buck" with high-fiber food, says Hart.
Antioxidant "Superfoods" to Protect Your Cells and Heart
When you're thinking "superfoods," think color, says Beverly Clevidence, PhD, a research leader at the USDA's Diet and Human Performance Laboratory. That means foods that are deep blue, purple, red, green, or orange. The carotenoids and anthocyanins that provide the color for these foods contain health-enhancing nutrients that protect against heart disease and cancer, and also improve our sense of balance, our memory, and other cognitive skills.
Your "superfoods" color chart should include:
Deep green -- Cruciferous vegetables like broccoli may help prevent colon cancer, while spinach and kale are good sources of calcium. And kale also helps fight against age-related macular degeneration, the leading cause of blindness in older Americans.
Red -- Red tomatoes, especially when cooked, are beneficial sources of lycopeine, which helps protect against prostate and cervical cancer.
Orange/yellow - Squash, carrots, sweet potatoes, and yams promote healthy lungs and help fight off skin cancers such as squamous cell carcinoma.
Deep blue/purple - Eggplant, plums, blueberries, blackberries (strawberries, raspberries, and cherries come under this category as well) lower your risk of heart disease by helping the liver "sop up" extra cholesterol, as well as improve your mental functioning.
"I've definitely been adding berries to my diet throughout the year," says Clevidence.
You don't have to limit your berry intake to in-season either. Fresh, frozen (without sugar), or dried...the benefits are the same.
Got milk? If you want to keep your bones strong and lessen your chance of fractures as you get older, add calcium-rich foods such as low-fat cheese and milk to your diet. Calcium also keeps teeth strong, helps your muscles contract, and your heart beat. Recent studies have even shown that calcium may lower your risk of colon polyps, and help you lose weight. Researchers at Purdue University found that women who consume calcium from low-fat dairy products, or get at least 1,000 milligrams a day, showed an overall decrease in body weight.
Water is also essential if you're eating high-fiber foods. Water helps fiber do its job."
As you get older, the amount of minerals in your bones decrease. Too little calcium increases your risk for osteoporosis and, with it, disabling or life-threatening fractures.
Dairy products are the best source of calcium. Choose skim milk, low-fat yogurt, and low-fat cheese to avoid saturated fats. A single serving can provide you with 20% of the 1,200 milligrams a day you need. You can also add calcium to your diet with calcium-enriched cereals and orange juice. Foods such as dark green vegetables, dried beans, and sardines also contain calcium.
Won't taking a calcium supplement do the trick? Sure, says William Hart, but calcium-rich foods are also high in protein needed for bone and muscle strength.
While you're adding calcium to your diet, don't forget to exercise. Your bones will thank you later. "Calcium alone isn't enough. Add weight-bearing exercise as well," says Hart. Take the stairs, park at the far end of the parking lot, walk wherever you can. You'll help the calcium do its job."
Water for Energy and Your Skin
Most people don't drink enough water," says nutritionist Susan Ayersman. "We need water to flush out toxins, keep our tissues hydrated, keep our energy up."
Water is also essential if you're eating high-fiber foods, says Leslie Bonci at the University of Pittsburgh Medical Center. Water helps fiber do its job.
Don't stint on water just because you don't want to get up in the middle of the night to use the bathroom, says Bonci. "Just be strategic about when you drink it," she says. "Drinking throughout the day, and not just before you go to bed should keep you from having to get up during the night."
If plain water doesn't quite do it for you, add slices of lemon, lime, or orange for flavor without calories. Or try a sprig of mint for a refreshing change of pace.
The Bottom Line
Don't be overwhelmed with all these suggestions. You don't need to add everything in at once. "Make haste slowly," says Bonci. "Add a bowl of oatmeal in the morning, replace a glass of milk with soy milk...just take it one step at a time."
Agrees Hart: "It's simply a matter of deciding to get the foods into your diet."
Originally published January 2004.
Medically updated August 2007.
SOURCE: William Hart, PhD, MPH, St. Louis University Doisy School of Allied Health Professions. Leslie Bonci, MPH, RD, director of sports nutrition, the University of Pittsburgh Medical Center. Beverly Clevidence, PhD, research leader, Diet and Human Performance Laboratory, USDA Agricultural Research Service. Susan Ayersman, CCN, Kronos, The Optimal Health Company. The American Dietetic Association website. The American Heart Association website.
©2007 WebMD Inc. All rights reserved.
Last Editorial Review: 8/28/2007
http://www.medicinenet.com/disease_prevention_and_awareness/article.htm
Best Healthy Diet Snacks Slideshow
The time to start eating them is now
By Carol Sorgen
WebMD Weight Loss Clinic - Feature
Reviewed By Kathleen Zelman, MPH, RD/LD
If you've made it this far in life, chances are strong that you may live into your 80s or even 90s. But will you be living well?
"We probably can't extend life much beyond what we already have done," says William Hart, PhD, MPH, associate professor of nutrition and dietetics at the St. Louis University Doisy School of Allied Health Professions. "But we can help make those last five to 10 years of life more enjoyable. Living longer isn't much fun if you're not healthy enough to enjoy it."
So what's the secret to staying healthy as you get older? Exercise, of course. Also, the right food. To get started, add these five nutrients to your diet.
Soy to Manage Your Cholesterol
"No, adding soy to your diet does not mean pouring more soy sauce on your Chinese food," says Leslie Bonci, MPH, RD, LDN, director of sports nutrition at the University of Pittsburgh Medical Center. It does mean adding soy foods such as tofu, soy milk, soy nuts, or the green soybeans called edamame by the Japanese.
Soy has an impressive resume, along with some inevitable controversy. Adding soy to your diet has been shown to significantly lower cholesterol, which can reduce your risk of heart disease. Plus, soy is high in iron, which many women need. Some women also say that soy helps them manage hot flashes and other symptoms of menopause, although those benefits have not been proven by long-term clinical studies.
Still, its cholesterol-lowering benefits are powerful enough. Indeed, the right diet can lower cholesterol as much as medication, according to a study reported July 2003 in The Journal of the American Medical Association. That four-week study found that a diet of soy fiber, protein from oats and barley, almonds, and margarine from plant sterols lowered cholesterol as much as statins, the most widely prescribed cholesterol medicine. Soybeans themselves provide high-quality protein, are low in saturated fat, and contain no cholesterol, making them an ideal heart-healthy food. To lower your cholesterol, the American Heart Association suggests you look for products that provide 10 grams of soy protein per serving, and try to eat three or more servings per day.
Fiber for Your Whole Body
Once upon a time our diet was made up mostly of whole foods loaded with fiber. While we may have fallen to a wild beast or infection, fiber helped keep our cholesterol and blood sugar levels low, and kept our bowels functioning smoothly.
Now in our frenzied lifestyle, we're more likely to grab fast food, or use prepared foods at home that have only a passing acquaintance with dietary fiber. It's a little known fact: Most of us should double the amount of fiber we eat if we want to reap its benefits.
"I don't think it would be a bad idea to flip the food pyramid and suggest 9-11 servings of fruits and vegetables a day instead of the 5-7 we recommend now," says William Hart. "None of us eats enough fiber." The average American eats 12 grams of fiber a day; most health organizations recommend 20 to 35 grams.
Studies have shown that dietary fiber - including foods such as apples, barley, beans and other legumes, fruits and vegetables, oatmeal, oat bran and brown rice -- clearly lower blood cholesterol. High-fiber foods are also digested more slowly, so they don't cause spikes in blood sugar levels like white bread, potatoes and sweets do. Of course, everyone knows that fiber helps keep you regular, but so do laxatives. Fiber, however, has an added plus: High-fiber foods help us feel full, making it easier to control weight.
You get more nutritional "bang for your buck" with high-fiber food, says Hart.
Antioxidant "Superfoods" to Protect Your Cells and Heart
When you're thinking "superfoods," think color, says Beverly Clevidence, PhD, a research leader at the USDA's Diet and Human Performance Laboratory. That means foods that are deep blue, purple, red, green, or orange. The carotenoids and anthocyanins that provide the color for these foods contain health-enhancing nutrients that protect against heart disease and cancer, and also improve our sense of balance, our memory, and other cognitive skills.
Your "superfoods" color chart should include:
Deep green -- Cruciferous vegetables like broccoli may help prevent colon cancer, while spinach and kale are good sources of calcium. And kale also helps fight against age-related macular degeneration, the leading cause of blindness in older Americans.
Red -- Red tomatoes, especially when cooked, are beneficial sources of lycopeine, which helps protect against prostate and cervical cancer.
Orange/yellow - Squash, carrots, sweet potatoes, and yams promote healthy lungs and help fight off skin cancers such as squamous cell carcinoma.
Deep blue/purple - Eggplant, plums, blueberries, blackberries (strawberries, raspberries, and cherries come under this category as well) lower your risk of heart disease by helping the liver "sop up" extra cholesterol, as well as improve your mental functioning.
"I've definitely been adding berries to my diet throughout the year," says Clevidence.
You don't have to limit your berry intake to in-season either. Fresh, frozen (without sugar), or dried...the benefits are the same.
Got milk? If you want to keep your bones strong and lessen your chance of fractures as you get older, add calcium-rich foods such as low-fat cheese and milk to your diet. Calcium also keeps teeth strong, helps your muscles contract, and your heart beat. Recent studies have even shown that calcium may lower your risk of colon polyps, and help you lose weight. Researchers at Purdue University found that women who consume calcium from low-fat dairy products, or get at least 1,000 milligrams a day, showed an overall decrease in body weight.
Water is also essential if you're eating high-fiber foods. Water helps fiber do its job."
As you get older, the amount of minerals in your bones decrease. Too little calcium increases your risk for osteoporosis and, with it, disabling or life-threatening fractures.
Dairy products are the best source of calcium. Choose skim milk, low-fat yogurt, and low-fat cheese to avoid saturated fats. A single serving can provide you with 20% of the 1,200 milligrams a day you need. You can also add calcium to your diet with calcium-enriched cereals and orange juice. Foods such as dark green vegetables, dried beans, and sardines also contain calcium.
Won't taking a calcium supplement do the trick? Sure, says William Hart, but calcium-rich foods are also high in protein needed for bone and muscle strength.
While you're adding calcium to your diet, don't forget to exercise. Your bones will thank you later. "Calcium alone isn't enough. Add weight-bearing exercise as well," says Hart. Take the stairs, park at the far end of the parking lot, walk wherever you can. You'll help the calcium do its job."
Water for Energy and Your Skin
Most people don't drink enough water," says nutritionist Susan Ayersman. "We need water to flush out toxins, keep our tissues hydrated, keep our energy up."
Water is also essential if you're eating high-fiber foods, says Leslie Bonci at the University of Pittsburgh Medical Center. Water helps fiber do its job.
Don't stint on water just because you don't want to get up in the middle of the night to use the bathroom, says Bonci. "Just be strategic about when you drink it," she says. "Drinking throughout the day, and not just before you go to bed should keep you from having to get up during the night."
If plain water doesn't quite do it for you, add slices of lemon, lime, or orange for flavor without calories. Or try a sprig of mint for a refreshing change of pace.
The Bottom Line
Don't be overwhelmed with all these suggestions. You don't need to add everything in at once. "Make haste slowly," says Bonci. "Add a bowl of oatmeal in the morning, replace a glass of milk with soy milk...just take it one step at a time."
Agrees Hart: "It's simply a matter of deciding to get the foods into your diet."
Originally published January 2004.
Medically updated August 2007.
SOURCE: William Hart, PhD, MPH, St. Louis University Doisy School of Allied Health Professions. Leslie Bonci, MPH, RD, director of sports nutrition, the University of Pittsburgh Medical Center. Beverly Clevidence, PhD, research leader, Diet and Human Performance Laboratory, USDA Agricultural Research Service. Susan Ayersman, CCN, Kronos, The Optimal Health Company. The American Dietetic Association website. The American Heart Association website.
©2007 WebMD Inc. All rights reserved.
Last Editorial Review: 8/28/2007
http://www.medicinenet.com/disease_prevention_and_awareness/article.htm
Ideally, he'd like to shoot for 120 years
(CBS) With the help of rhesus monkeys, scientists at the National Institute of Health may be unlocking the mysteries of long life.
The answer, it seems, is not the magic of technology or powerful new drugs, but, as CBS News Correspondent Elizabeth Kaledin reports, it's something much simpler: food - a lot less food.
For 15 years researchers have compared monkeys fed normal diets to those fed 30 percent less. The monkeys eating fewer calories have lived much longer and avoided disease.
"There's no question that diet contributes to aging and disease," says Dr. Donald Ingram, of the National Institutes of Health. "We have determined that several markers of potential age-related disease have been reduced in monkeys on calorie restriction."
How eating less affects the aging process is still unclear. One theory is that, simply put, when the body has fewer calories it has to decide more wisely how to use them, and they tend to be invested in self-preservation.
In animal studies cells that might have become cancerous were the first to die. Experts on aging are intrigued.
"If we can begin to understand what it is that relates to this extension of life and then put it in a bottle and have it as a medicine, that might be fantastic," says Dr. Robert Butler, of the International Longevity Center.
Dean Pomerleau isn't waiting for any medicine. Convinced by the animal studies, he and a small group of people are already practicing calorie restriction in the hopes of living longer.
Ideally, he'd like to shoot for 120 years.
Pomerleau wakes up at 4:30 every morning to prepare and package huge portions of salad, which he consumes three times a day.
"I eat about six pounds of vegetables a day," he says.
He also eats sprouts home grown in his basement, fruit and small quantities of lean protein, like fish.
"The bulk of the diet I eat keeps me from getting hungry ever."
In two and half years Pomerleau has lost 45 pounds. The extreme thinness has meant more brittle bones and a decreased libido, but his health, he says, is better than ever:
"I haven't had a cold that's lasted more than a half a day," he says. "I think my mood and sense of well being have improved substantially since being on the diet."
Pomerleau admits it's extreme, but "I see it as worth it to experience more of life to give up a slice of pizza."
That is unlikely to be a view shared by most Americans notorious known for loving their food. So even if calorie restriction does work in extending human years, scientists may find their biggest challenge is convincing people to trade in quality of life for quantity of life.
http://www.cbsnews.com/stories/2002/07/08/eveningnews/main514443.shtml
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