We report on a patient with 11 metachronous multiple early gastric cancers treated by gastrectomy after endoscopic resection. An 87-year-old Japanese woman was admitted to our hospital for treatment of four synchronous multiple early gastric cancers detected by endoscopic examination. The patient had a history of two endoscopic treatments for four metachronous early gastric cancers. The pathological findings of four lesions resected by endoscopic resection and four biopsy specimens showed well-differentiated carcinoma. In March 2012, we performed a distal gastrectomy for four lesions. The surgical specimen revealed 3 minute lesions after surgery in addition to these four lesions. Histologically, all seven lesions were intramucosal well-differentiated adenocarcinomas without vascular invasion. Although the incidence of synchronous and metachronous early gastric cancer is reportedly 11-14.5 % and 8.5-14 %, respectively, only two or three lesions are generally present. Moreover, multiple early gastric cancers usually originate as differentiated adenocarcinoma in male elderly patients with intestinal metaplasia. In the present case, there were multiple early gastric cancers, whose origin may be correlated with the background of intestinal metaplasia, in excess of the number generally expected.
Keywords: Early cancer; Metachronous cancer; Multiple gastric cancers.