A case report of a primary adenocarcinoma and a goblet cell carcinoid lesion located in the appendix complicated by a pelvic abscess

Abstract

A 78-year-old female was admitted to hospital due to lower abdominal pain. Abdominal CT scan showed a pelvic cystic mass and a swollen appendix. Under a pre-operative diagnosis of acute appendicitis with a pelvic abscess, an appendectomy and drainage were performed. Histopathological examination revealed a moderately differentiated adenocarcinoma invading the subserosa in the proximal appendix and a goblet cell carcinoid located at the distal portion of the appendix. Due to the presence of the adenocarcinoma in the proximal margin of the resected appendix, a right hemicolectomy with D3 dissection were performed. Only one case of primary adenocarcinoma of the appendix with goblet cell carcinoid has been previously reported in Japan.