Gastric cancer

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In medicine, cancer is a general term for any of a number of different diseases where some of the body's own cells divide in an uncontrolled manner. The resulting new cells can form a malignant tumor (a neoplasm) or propagate throughout the body.

Cancers are capable of spreading through the body by two mechanisms: local invasion and distant metastasis. Invasion refers to the direct migration and penetration by cancer cells into neighboring tissues. Metastasis refers to the ability of cancer cells to penetrate into lymphatic and blood vessels, circulate through the bloodstream, and then invade normal tissues elsewhere in the body. Cancer is most deadly when it metastasizes.

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)

  • HCA Cancer Guides
    General information including treatment options.
  • Yahoo Health: Chemotherapy Center
    Information on chemotherapy including basic facts, what to expect, side effects and a FAQ.
  • CancerDirect
    Patient consultation service offering treatment advice, online second opinions and oncologist referral for individual disease.
  • CancerNausea.com
    Presents information to help manage nausea and vomiting caused by chemotherapy or radiation treatments.
  • Cancer-help.org
    Links to articles about tumors, treatments and care.