Cancer staging
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Malignant tumors such as carcinoma or sarcoma, lymphoma or leukemia originate from a cell or a group of cells in a multicellular organism that has several distinct properties:
- evading apoptosis
- Unlimited Growth Potential
- self-sufficiency of growth factors
- insensitivity to anti-growth factors
- increased cell division rate
- altered differentiation (specialization) ability
- no ability for contact inhibition
- ability to invade neighbouring tissue
- ability to build metastases
- ability to promote blood vessel growth (angiogenesis)
In cellular model systems, cells are exposed to carcinogenic influences (chemicals, radiation). In these systems, the first signs of a cell developing into a tumor cell are:
- Immortality. The usual number of cell divisions for a mammalian cell is 50-60 (cell senescence), then it ceases to divide. Tumor cells keep dividing forever.
- Altered morphology.
- Building of cellular clusters (Foci).
- Loss of contact inhibition.
- Low or no need for growth factors.
Items 2-4 (above) can sometimes be traced to mutations in genes that result in a disruption of cell adhesion. Some cell adhesion proteins are oncogenes.
The term cancer is very broad and covers many different illnesses including:
- Carcinoma (arising from epithelial cells)
- Bladder carcinoma
- Breast cancer
- Cervical cancer
- Colorectal cancer (includes colon, rectum, anus, and appendix)
- Esophageal cancer
- Endometrial cancer (uterus)
- Hepatocellular carcinoma (liver)
- Laryngeal cancer
- Lung cancer
- Oral cancer
- Ovarian cancer
- Pancreatic cancer
- Prostate cancer
- Renal cell carcinoma (kidney)
- Skin cancer
- Stomach cancer
- Testicular cancer
- Thyroid cancer
- Sarcoma (arising from connective tissue and related)
- Gastrointestinal stromal cell tumor (GIST)
- Rhabdomyosarcoma (muscle)
- Osteosarcoma (bone)
- Hematological malignancies (blood and bone marrow)
- Leukemia
- Lymphomas
- Hodgkin's disease
- Non-Hodgkin's lymphoma
- Multiple myeloma
- Miscellaneous
- Brain tumor
- Melanoma, Moles and dysplastic nevi
- Teratoma
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- Cancer Options UK
Designed to help patients and families find appropriate treatment options and services. Provides access to a nurse specialist. - Cancer Page
Information and community resources including chat rooms, message boards, physician directory and clinical trials. - Cancer Consultants.com
Provides information on treatment and prevention for patients and professionals. - Cancer Leadership Council
A patient-centered forum of national advocacy organizations addressing public policy issues. - USnews.com: Best Cancer Hospitals
Ranking by the magazine of the fifty top cancer hospitals in the United States.