Tobacco cancer

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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.

Treatment of cancer typically involves surgery to remove tumors and nearby lymph nodes to which the cancer may have spread, combined with radiation therapy and/or chemotherapy. The latter two target cells in the body that are rapidly dividing. This includes the cancer cells but also certain healthy ones, which is the reason for the severe side effects of these treatments.

Carcinogenesis (lit.: creation of cancer) is the process of derangement of the rate of cell division.

  • Cancer Nutrition Center
    Explores the link between tumors and nutrition. Offers dietary advice for patients.
  • CancerLinks.org
    Resources about the condition and treatment in a links format.
  • NetCancerAlert
    Provides access to articles and links which are oncology related.
  • CancerSymptoms
    Discusses common symptoms related to cancer treatment. Provides email access to a nurse for questions.
  • Suite 101
    Articles and links about cancer treatments.