[Follow-up of colorectal cancers]

Recurrence of colorectal carcinoma after curative surgery amounts to 30-40%. It is more frequent with deep penetration of the cancer, in young or old patients and in high risk groups. Familial polyposis, ulcerative colitis, Lynch's syndromes, and past history of adenoma or cancer are the best examples. The follow-up is effective if strict protocols are used, with frequent examinations. However, they are costly in comparison with results. Colonoscopy is essential for surveillance of the large bowel. Clinical evaluation, ultrasonography and CEA are useful for extra-colonic deposits.