The etiology and risk factors for both Ca colon and CA rectum are same.
Etiology
☹- SAD
S- smoking
A- alcohol
D- dietary factors (red meat is bad, fibre is good)
Risk factors
Familial polyposis coli
IBD – ulcerative colitis
Adenomatous polyp
Colorectal family
Old age ,obese and lack of physical activity predispose to cancer colon and rectum
Apart from these general etiology for cancer such as genetics , family history etc
For both of these answers imagine an American old obese man who is smoking and drinking and eating beef burger (red meat) on a couch.
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