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There are so many different kinds/types of this disease it is hard to focus on just one.
With that in mind I have listed (a short list, I assure you) some here to give an idea.
Please visit the American Cancer Society Home Page for descriptions/explanations of these and other ailments.

adrenal cortical cancer
aplastic anemia
bile duct cancer
bladder cancer
bone metastasis
brain: cns tumors in children and adults
breast: several types
castleman disease
cervical cancer
childhood non-hodgkin's lymphoma
endometrial cancer
esophagus cancer
ewing's family of tumors
gastrointestinal carcinoid tumors
gastrointestinal stromal tumors
gestational trophoblastic disease
hodgkin disease
kaposi's sarcoma
leukemia: several types
malignant mesothelioma
multiple myeloma
myelodysplastic syndrome
nasopharyngeal cancer
penile cancer
pituitary tumor
waldenstrom's macroglobulinemia
wilms tumor

Quite simply, the definiton of cancer is:
Abnormal cells in a part of the body that begin to grow out of control.


Cancer is a complex group of over 100 diseases. Cancer diseases share the common feature of uncontrolled spreading of malignant (harmful) cells in the human body.

Under normal conditions, the cells in the human body divide and grow in an orderly, controlled manner. Cancer occurs when cells grow in an uncontrolled manner, forming a mass of tissue. This mass of tissue is called either a tumor or a lesion.

A cancerous tumor is called a malignant tumor. Malignant tumors can spread to surrounding tissue. Cells from malignant tumors also can break away from the tumor, usually by way of the bloodstream. These cells can travel to other parts of the body, where new tumors may form. This is how cancer spreads. The term for this spreading is metastasis. A tumor which forms this way always consists of cells identical to those of the original tumor.

Not all tumors are cancerous. When a tumor is not cancerous, it is called a benign tumor. Benign tumors often can be removed with surgery and usually do not come back. The cells in benign tumors do not invade other tissues or spread to other parts of the body. In other words, these tumors do not spread, or metastasize.

In most cases, the cause of a cancer is unknown. However, we do know that for some types of cancer, certain risk factors seem to make some people more likely to develop them. Many questions remain unanswered as to why other people can have the same risk factors and never get cancer.

There is no typical way to feel when you are told that you have cancer. Everyone feels and responds differently. Some people experience several emotions at once, ranging from fear, sadness—even anger—to motivation and determination.

There is, however, one feeling that seems consistent for many people who are diagnosed with cancer—and that is a loss of control. One way to regain a sense of control in your life is to learn as much as you can about your disease and treatment options, so you can discuss them openly with your healthcare team.


Dictionary of Cancer Terms
by The National Cancer Institute



National Cancer Institute
Cancer Care
Cancer Research in the UK
American Association for Cancer Research
Canadian Cancer Society
The Breast Cancer Site
CancerBACUP: Europe's leading cancer information service
American Institute for Cancer Research
MacMillian Cancer Relief
NCCN - National Comprehensive Cancer Network Homepage

CureSearch: Childhood Cancer

IARC-International Agency for Reseach on Cancer

NBCC-National Breast Cancer Coalition

The Skin Cancer Foundation

The National Ovarian Cancer Coalition

Lung Cancer Online

Colon Cancer Alliance

Prostate Cancer Foundation

Breast Cancer Action:
(education and advocacy organization located in San Francisco, California)

Cancer Center: Treatment Hospitals

The Cancer Council of Australia

Breast Cancer Info. and Support

The Oral Cancer Foundation

Cancer Prevention Coalition

The National Children's Cancer Society:
St. Louis, Missouri

The Eye Cancer Network

Women's Cancer Network


Power lines and Cancer

Texas Cancer Data Center

NCCS - National Coalition for Cancer Survivorship

Mesothelioma Resource Online

Cancer Society of New Zealand

GCF - Gynecologic Cancer Foundation

Intercultural Cancer Council

Irish Cancer Society

Japanese Cancer Association

ThyCa: Thyroid Cancer Survivors' Association

The John Wayne Cancer Institute


Don't worry, there are more links coming.
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