文档介绍：Colon cancer prevention Colon cancer prevention and screening and screening Roger Thomas Roger Thomas MD, . CCFP, MRCGP MD, . CCFP, MRCGP Professor, Department of Family Medicine; Professor, Department of Family Medicine; Cochrane Collaboration Coordinator, Cochrane Collaboration Coordinator, U of Calgary U of Calgary Goals: to know and use to solve cases Goals: to know and use to solve cases 1. 1. Rates of rectal bleeding in munity Rates of rectal bleeding in munity 2. 2. Risks of colorectal neoplasms Risks of colorectal neoplasms 3. 3. Guidelines for prevention of colon cancer: Guidelines for prevention of colon cancer: (a) US Preventive Services Task Force 2008 (a) US Preventive Services Task Force 2008 (b) Canadian Association of Gastroenterology (b) Canadian Association of Gastroenterology (c) US society of colon and rectal surgeons 2006 (c) US society of colon and rectal surgeons 2006 (d) American Cancer Society, US Multi-Society Task (d) American Cancer Society, US Multi-Society Task Force on Colorectal Cancer and American College of Force on Colorectal Cancer and American College of Radiology 2008 Radiology 2008 4. The sensitivity and specificity of screening with: 4. The sensitivity and specificity of screening with: (a) FOBT (ult II) (a) FOBT (ult II) (b) FOBT vs. immunochemical tests (b) FOBT vs. immunochemical tests (c) optical colonoscopy vs. virtual colonography (c) optical colonoscopy vs. virtual colonography Possible risks for Colon Cancer Possible risks for Colon Cancer ?? History of changed bowel habit (less History of changed bowel habit (less frequent, and loss of habit of stooling at frequent, and loss of habit of stooling at regular time each day) regular time each day) ?? more effort to expel stool more effort to expel stool ?? more constipation more constipation ?? more use of laxatives more use of laxatives ?? sm