Cancer pictures

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

The field of medicine concerned with the treatment of cancer is oncology. Cancer has become an important problem with the rise in life expectancy, as the abovementioned mutations become more likely the longer a person lives. Though great progress in treatment has been made, most cancers in advanced stages remain incurable and ultimately fatal.

Cancer is, ultimately, a disease of genes. Typically, a series of several mutations is required before a cell becomes a cancer cell. We distinguish between oncogenes, which promote cancer when "switched on" by a mutation, and tumor suppressor genes, which prevent cancer unless "switched off" by a mutation. These mutations can have various causes: radiation or chemicals called carcinogens; some inherited predisposition is not uncommon; some viruses that can cause cancer have also been described. Usually, they carry in their genome some oncogene or tumor suppressor inactivating gene. In about 15% of all cancers, viruses seem to play a role; Bacteria, like Helicobacter pylori, also induce carcinogenesis by a process of chronic inflammation. Finally, damage by free radicals, which are a natural by-product of oxygen metabolism, can cause mutations in the DNA.

  • ChemoCare
    Scott Hamilton’s chemotherapy site offers general treatment information for cancer patients. Sponsored by Ortho Biotech.
  • Shirley's Wellness Cafe
    Promotes holistic and alternative approaches for cancer prevention and treatment.
  • Chemotherapy-Induced Nausea And Vomiting
    A detailed review of this subject in pdf format aimed at the professional level.
  • OncoLink
    Extensive information including news, prevention, clinical trials, conferences and psychosocial support from the University of Pennsylvania Cancer Center.
  • MyOwnBiopsy
    Provides "translations" of cancer pathology reports from medical jargon into understandable lay terms.