Health Sciences 1001A/B Lecture Notes - Lecture 13: Five-Year Survival Rate, Breast Cancer Screening, Breast Cancer Awareness
14 Jul 2016
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Document Summary
In canada, cancer is responsible for 1 in 4 deaths. Cancer is the leading cause of disease-related death among people under age 65. Cancer: the abnormal, uncontrolled multiplication of cells that, if left untreated, can ultimately cause death. Tumors (neoplasm): mass of tissue that serves no physiological purpose. Benign (noncancerous) tumors: made up of cells similar to the surrounding normal cells and are enclosed in a membrane that prevents them from penetrating neighboring tissues. Malignant tumor (cancer): invade surrounding structures and spread to distant sites via the blood and lymphatic circulation, producing invasive tumors in almost any part of the body. Metastasis: the spreading of cancer cells from one part of the body to another. Occurs because cancer cells do not stick to each other as strongly as normal cells do. Therefore remain at the site of the primary tumor (the cancer"s original location) Secondary tumors (or metastases) new tumors resulting from metastasizing.
