A 67-year-old man was admitted to our hospital because of right lower abdominal pain. Abdominal CT scan showed swelling and hypertrophy of the appendix wall and presence of a low density area near the appendix. We thus diagnosed this case as acute appendicitis with abscess and performed an emergency operation. When laparotomy was done, we observed the swelling of the appendix, and a mass bordered on the appendix which adhered tightly to the jejunum. The patient underwent appendectomy and partial resection of the jejunum. A pathological examination revealed mucinous adenoma of the appendix. The mass bordered on the appendix was mucocele. The mucocele adhered to the jejunum and the mucus infiltrated to the muscularis propria of the jejunum. He had an uneventful post operative course and was discharged from our hospital on the 12th postoperative day. Mucinous cystadenoma of the appendix adhered to the jejunum is very rare and we report our case with some literature review.

  A 67-year-old man was admitted to our hospital because of right lower abdominal pain. Abdominal CT scan showed swelling and hypertrophy of the appendix wall and presence of a low density area near the appendix. We thus diagnosed this case as acute appendicitis with abscess and performed an emergency operation. When laparotomy was done, we observed the swelling of the appendix, and a mass bordered on the appendix which adhered tightly to the jejunum. The patient underwent appendectomy and partial resection of the jejunum. A pathological examination revealed mucinous adenoma of the appendix. The mass bordered on the appendix was mucocele. The mucocele adhered to the jejunum and the mucus infiltrated to the muscularis propria of the jejunum. He had an uneventful post operative course and was discharged from our hospital on the 12th postoperative day.Mucinous cystadenoma of the appendix adhered to the jejunum is very rare and we report our case with some literature review.