<prompt> Abdomino-Perineal resection is done in colorectal carcinoma on the basis of: March 2013 hAge of the patientDistance from anal vergeFixity of tumourHepatic metastasis  <response>: Ans. B i.e. Distance from anal verge Colorectal carcinoma MC site: Rectum, MC site in colon: Sigmoid colon MC type: AdenoCa Presentation of right sided tumour: Anemia Left sided tumour presents as: Obstruction pain Risk factors: -- Increased dietary fats oil, -- Elevated serum cholesterol, -- Ulcerative colitis Crohns disease, -- Familial adenomatous polyps MC site of metastasis: Liver 33 patient may have metastasis Treatment of choice: Surgery 