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[carcin- + -oma]
A malignant tumor that occurs in epithelial tissue and may infiltrate local tissues or produce metastases. It may affect almost any organ or part of the body and spread by direct extension, through the lymphatics, or through the bloodstream. The causes vary with tumor type.

Optimal patient care includes identifying and explaining to the patient and his or her family the type of cancer and its typical natural history; options for treatment; side effects of treatments; expected response of the cancer to the treatment; best predictions for recovery and life expectancy; availability of clinical trials; alternative and complementary therapies; and the potential benefit of referral to specialty cancer centers.

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