Selenium may be protective through and antioxidant effect. Support idea that high-fat affects risk but also not always consistent. Familial Polyposis coli and its variants, Gardner's syndrome, Turcot's syndrome Muir's syndrome, cancer family syndrome, and inflammatory bowel disease have been identified as etiologic factors in colonic carcinogenesis. Genetics may account for more cases than suspected, however where the gene is expressed to a lesser e xtent, environmental factors may play a greater role. Increase in colon cancer more pronounced in right side.
Rectal cancer appears to be decreasing.
Is the surgery the risk factor or whatever caused the need for the surgery. Appears that hormones affect bile secretion, with serum cholesterol levels being lower in women during their reproductive years concurrent with increased saturation of bili ary secretions with cholesterol and decreased bile acid secretions. Grosarth-Matieck et al, Persky et al. Psychosocial variables may bolster or suppress immune function.