Health Sciences 1002A/B Chapter Notes - Chapter 8: Proteasome, Antibody, Dysphonia
27 Feb 2014
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Document Summary
Every case of cancer begins as a change in a cell that allows it to grow and divide when it should not. Symptoms may be a lump/tumour or persistent cough or unexplained bleeding and in the case of leukemia, changes in the blood. Tumour: a mass of tissue that serves no physiological purpose; also called a neoplasm. May be felt as a lump or seen through an x-ray or biopsy and then diagnosed as cancer. Benign tumour: a mass of tissue that is not cancerous. It is enclosed in a membrane that prevents them from penetrating neighbouring tissues. They are dangerous only if their physical presence interferes with body functions. Malignant tumour: a mass of tissue that is cancerous and capable of spreading. Can invade surrounding structures and can produce invasive tumours in almost any part of the body if it spreads (via the blood and lymphatic circulation)
