[Metachronous carcinoma of the colon: report of a clinical case].

The Authors deal with a rare case of 'meta-metachronous' carcinoma of the colon. A seventy years old man was admitted to ward after being diagnosed an adenocarcinoma of the transverse colon. The anamnestic data pointed out that the patient had already been operated twice for the colon carcinoma, which had been diagnosed in the left colon and in the cecum respectively seven and two years before. A colonoscopy performed sixteen months before did not show any lesion of the residual colon. It is likely that tiny lesions, which were still in the adenoma phase, were not diagnosed by the endoscopy; it is also possible that the adenoma-carcinoma sequence was extremely fast. On the basis of this experience the Authors recommend that patients with metachronus carcinoma undergo either frequent controls or a preventive subtotal colectomy.