Is most commonly found in the 6 th to 7 th decades of life. It occurs earlier in patients with polyposis syndromes.
Rectal tumors are more common in males.
Decreased consumption of vitamins C,A, and E. Low vegetable diet. Low fiber diet. Existence of polyposis syndromes. Grossly the tumor may be ulcerating, fungating and polypoid or constricting, annular and circumferential. Microscopically appear as adenocarcinoma and shows various degrees of differentiation.