Quintuple carcinomas with metachronous triple cancer of the esophagus, kidney, and colonic conduit following synchronous double cancer of the stomach and duodenum.

A patient who had undergone radical gastrectomy for synchronous gastric cancer (T(1)N(0)M(0), stage I) and duodenal cancer (Tis, stage 0) in November 1987 was found to have esophageal cancer in November 1994, and underwent radical thoracolaparotomy at our hospital (T(1)N(0)M(0), stage I). After follow-up for about 3.5 years, renal cancer was detected in April 1998, and radical nephrectomy was performed (T(1)N(0)M(0), stage I). Two years later, in April 2000, the patient was found to have a polypoid lesion in the colonic conduit used for reconstruction after esophagectomy, and endoscopic mucosal resection was performed (Tis, stage 0). The patient remains under careful follow-up, including observation of the colonic conduit and the residual large intestine.