Abstract
A 59-year-old man admitted to our hospital suffering from lower abdominal and back pain. Acute appendicitis was suspected from the results of blood test, computed tomography. Appendectomy was done. The histological diagnosis was Goblet cell carcinoid of vermiform appendix. Eight days later, ileocecal resection was done. Goblet cell carcinoid of vermiform appendix is a rare disease in Japan. It has both the characters of carcinoid and adenocarcinoma, and has poorer prognosis than argentaffin carcinoid and argyrophil carcinoid have. It is important to investigate the specimen macroscopically and microscopically at the treatment for appendicitis, considering the hidden carcinoid, although it is rare.