Abstract
A case of appendiceal endometriosis is reported. A 45-year-old woman was seen at another clinic for bloody stool. Barium enema demonstrated a cecal tumor, and she was sent to our hospital for further examination. Abdominal CT showed cystic changes of the appendix. She was diagnosed as having an appendiceal mucocele. However, mucinous cystadenoma and mucinous cystadenocarcinoma of the appendix could not be excluded, so a laparoscopic ileocecal resection with lymph node dissection was performed. Microscopic findings showed endometrial stroma and glands in the appendiceal mucosa, submucosa, muscularis propria, and subserosa, and she was diagnosed with appendiceal endometriosis. Appendiceal endometriosis should be considered when diagnosing appendiceal mucocele.
