Health Sciences 1001A/B Chapter Notes - Chapter 8: Cervical Cancer, Rectal Examination, Fine-Needle Aspiration
15 Mar 2014
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1: cancer: abnormal, uncontrolled multiplication of cells that, if left untreated, can ultimately cause death, leading cause of death (canada), 1/4, lifestyle choices: dietary & exercise habits. Tumours: tumour: mass of tissue, serves no psychological purpose, benign (noncancerous)- cells similar to surrounding normal cells, enclosed in membrane that prevents them from penetrating neighboring tissues; only dangerous if interferes w/ functions. Metastasis: metastasis: spread of cancer cells from one part of body to another. Stages of cancer: method of classifying progress/extent of cancer in person, figure 8. 2- tumour stages. The incidence of cancer: 2008: 12 million new cases diagnosed, 7 million deaths, 25 million people living w/ diagnosis, reduction/prevention: 90% less w/ sunscreen (skin), 87% reduce/avoid tobacco smoke (lung) Risk factors: 30%=all cancer; 85% caused by tobacco smoke; combined w/ other pollutants=10x risk, environmental tobacco smoke (ets): nonsmoker increase by 20% to people not exposed.
