February 2024
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Colorectal-Cancer

is the second most common type of cancer, and accounts for almost 80% of cancers of the digestive tract. The vast majority of colon and rectum cancers are adenocarcinomas, around 10% of these are mucinous (protein contained in mucus). Surgery is the main form of treatment, though modest benifits of adjuvant chemotherapy have been demonstrated. The median age at diagnosis is 70, age adjusted incidence rates are slightly higher in males compared to females. A substantial proportion of cases are in those with a genetic predisposition to colorectal cancer. Diet may also have an influence on the incidence of colorectal cancer, diatry fibre, retinoids, and calcium are thought to be protective, while high intake of animal fats may increases risk. Colorectal cancer may develop from benign polyps (a polyp is a tumour on a stem most commonly found on mucous membranes). Screening of high risk populations (for those over age 50, particularly those with a 1st degree relative dignosed with colorectal cancer, or familial predispostion to adenomatous polyposis) may be of benifit in detecting colorectal cancer at an early stage. Compare with: Barium-Enema Compare with: Fecal-Occult-Blood-Test

 

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