Cancer is a group of abnormal, unhealthy cells.
From a biological perspective, cancer arises from a loss of normal control of cellular growth.
In healthy body tissues, cells grow, divide, and die. The rates of new cell growth and old cell death are kept in balance.
The cellular process is complex and does not always work without malfunction. Normal cells become abnormal. The human body contains self-repair mechanisms that recognize damaged cells and work to either destroy or control their further growth. However, sometimes defenses do not work properly.
In cancer, cellular balance has gone awry. The normal cellular process became abnormal with mutated cells that have not self-destructed. Without apoptosis, or programmed cell death, the damaged cells have not committed suicide. Instead, the abnormal cells with DNA errors experience uncontrolled growth resulting in cancer. The cancer type is usually named based on the part of the body where it originally began.
Research shows that cancerous cells have variations in the size and shape of the nucleus and other components of the cell. This loss of normal tissue organization ranges from well-differentiated to poorly-differentiated in more aggressive cancers. Poorly-differentiated cancer cells have transformed far beyond the original normal cells.
"It is much more important to know what sort of patient has a disease, than what sort of disease a patient has."
-Sir William Osler, MD
Does cancer always develop when abnormal cells form?
No. Cancer does not always develop when abnormal cells form.
In Anticancer, David Servan-Schreiber, MD, PhD shares the following important facts.
All of us have cancer cells in our bodies.
We are all exposed to cancer promoting factors.
But not all of us will develop cancer.
- 1/4 will die of cancer
- 3/4 will be protected by natural defenses
Why do some abnormal cells become cancer and others do not?
The scientific community is now focusing increasing attention on what Stephen Paget, MD discovered in 1889. In the journal The Lancet, he wrote that cancer only grows in fertile soil, or a hospitable environment in the body, for the diseased cells.
"When plant goes to seed, its seeds are carried in all directions, but they can only live and grow if they fall on congenial soil."
The internal environment of the body strongly impacts whether or not cancer will grow in each individual. The environment in each person is defined through many factors, including diet, inflammation status, detoxification functions, the immune system, sleep patterns, exercise, weight, other lifestyle choices, the mind-body, spirituality, social support, the external environment, and additional components.
The internal environment is also strongly impacted and even defined by the external environment. Indeed, studies demonstrate a link between cancer and the environment. Even the National Cancer Institute states that the majority of cancers could be prevented by acting on what is known about environmental causes of cancer.
What is the difference between benign tumors and malignant tumors?
Benign tumor cells grow locally and cannot spread by invasion or metastasis. Often, benign tumors can be removed surgically and are not life-threatening. An exception involves benign brain tumors due to unique complications from the exact location in the brain.
Malignant tumor cells invade neighboring tissues, enter blood vessels, and metastasize to different sites.
What is metastatic cancer? How does cancer spread to other parts of the body?
Cancer can spread or metastasize by traveling to other parts of the body from the primary site, or location of the original tumor. Metastasis means one tumor. Metastases is plural for two or more tumors.
The most common sites of metastasis from solid tumors are the lungs, bones, liver, and brain. However, tumors that originate in the brain do not metastasize. Cancer usually metastasizes through the blood or lymphatic system. The metastatic tumor cells usually contain the same type of cancer cells found at the primary site.
Research indicates that metastasis is the end product of an evolutionary process in which diverse interactions between cancer cells and their microenvironment yield alterations that allow these cells to survive.
Scientists continue to study the mechanisms or processes through which metastasis occurs. Primary cancer cells sometimes plant their seeds at metastatic sites while the primary tumor is in its earliest state. Research suggests that metastatic cells detach from the primary site, disperse, and then travel through the blood. These cells reattach in another part of the body sitting dormant until a change occurs in the host tissue and overall environmental condition. Studies have identified signaling systems between the primary cancer site and the metastatic cancer cells. Surviving metastatic tumor cells appear to receive signals from their environment that may cause rapid cell growth years later.
Read this information carefully. Cancer metastasis is related to the entire environment in the body. The environment can be influenced.
What other basic information should people know about cancer?
As a starting point, people with cancer become better informed by learning about the type, stage, location(s) of the cancer, and size. Sometimes the stage of the cancer is not confirmed until a biopsy or surgery has been performed. Basic information about cancer treatments can be found in Conventional Cancer Care. Links to other sources with more detailed information about cancer are available through Top Cancer Resources.
For people with cancer, we recommend that you really think about who you are and what you are capable of. Tap into your inner fortitude and ponder how you want to approach your health challenge. Remember what you enjoy and decide how you want to live. Choose where you want to focus your attention.
Today, many cancers are treated as a chronic disease. People diagnosed with cancer can improve their quality of life and survival through integrative cancer care. Although cancer does not discriminate based on race, sex, age, and other variables, the risk of getting cancer increases with age. People with and without cancer benefit from learning about reducing cancer risk and cancer prevention.
What is the relationship between healthy and unhealthy cells in people with cancer?
The human body is comprised of approximately 10 trillion cells. Healthy cells create your bodily functions and give you life. They are configured to help you thrive to your optimal potential.
If you have cancer, you have a group or groups of abnormal, unhealthy cells. Any pockets of cancer in the human body are very minor in comparison to the multitude of healthy cells you possess.
Cell biology suggests that a cancerous cell is a weak and confused cell.
How can healthy cells be supported?
Research has demonstrated that specific approaches support healthy cells and weaken unhealthy cells. Our resources provide information about strategies to support healthy cells and weaken unhealthy cells through an integrative cancer care plan. These strategies also reduce cancer risk to support cancer prevention. Diet, inflammation status, detoxification functions, the immune system, sleep patterns, exercise, weight, other lifestyle choices, the mind-body, spirituality, social support, and the external environment strongly impact cells in the body. In addition, specific treatments to support healthy cells and weaken unhealthy cells can be found in Integrative Medicine Systems, Herbs and Supplements, and Other Therapies.
Books provides additional direction for you to learn more about supporting healthy cells and a healthy self. Two excellent books in particular about integrative cancer care explain ways to create a healthier microenvironment that is not hospitable to cancer cells and improve overall health through the entire environment in the body.
- Anticancer by David Servan-Schreiber, MD, PhD
- Life Over Cancer by Keith Block, MD
What are some other resources about the internal environment in the presence of cancer?
News articles highlight increasing scientific attention to the role of the microenvironment in cancer's development.
Our most popular resources about the body and cancer
 Nutrition and Cancer Top Tips
You are what you eat! Some foods kill cancer cells and others promote cancer cell growth. Learning the difference between healthy and unhealthy foods in the midst of cancer is essential.
 Inflammation and Cancer
Turn down the heat and extinguish the fire. Inflammation is associated with cancer. Empower yourself with this must know information to reduce cancer risk, improve quality of life, and in some cases cancer survival.
 Antioxidants and Cancer
Foods and supplements with antioxidants provide important health benefits, including against cancer. Also learn about potential risks and benefits when combining antioxidants with radiation and chemotherapy.
 Conventional Cancer Treatments
Read information about conventional cancer treatments. Learn about the benefits of using conventional cancer treatments in an integrative model. Explore our resources for quality cancer care.
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