A case of duplicated vermiform appendix

Abstract

A 67-year-old man was referred to our hospital for further investigation of a cecal submucosal tumor (SMT) . Colonoscopy (CS) revealed the cecal SMT was approximately 15 mm in diameter and covered with normal mucosa. EUS showed the lesion to be continuous into the third or fourth layer of the cecal mucosa, with a fairly homogeneous echogenicity. Laparotomy was performed with the aim of diagnostic therapy. A cystic lesion was located in the resected material near the vermiform appendix. On pathology, the cystic lesion consisted of mucosa similar to that in the vermiform appendix, and duplication of the vermiform appendix was diagnosed. Alimentary tract duplication is rare, and preoperative diagnosis is difficult. This diagnosis should be considered a differential for alimentary canal submucosal tumor.