in conclusion , the differences of sex ratio at different colonic subsites , the higher fraction of adenocarcinomas with adenomas in cancer of the more distal tracts of the large bowel , and the more marked familial occurrence of colorectal cancer in patients with right-side neoplasms tend to support the view that cancer of the proximal colon , cancer of the distal colon , and cancer of the rectum may actually be three different types of tumors .
C0001418
adenocarcinomas
C2981607
types