A case of Low-grade appendiceal mucinous neoplasm treated with laparoscopic management which was originally diagnosed right cystic adnexal mass

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We experienced the case of Low-grade appendiceal mucinous neoplasm treated with laparoscopic management, which was originally diagnosed as a right cystic adnexal mass. The case involved an 81-year old woman had undergone a total abdominal hysterectomy for leiomyoma of the uterus when she was 48 years old. She was refered to our hospital after being diagnosed with a cystic lesion of the pelvis at a local internal medicine clinic, with a dull pain in her right lower abdomen. We suspected a right ovarian cyst, but no conclusive evidence was found, so we performed exploratory laparoscopic operation. We found that the uterus and both adnexa had been extracted, and the cyst was derived from appendix, so we performed appendectomy. We made the diagnosis of a Low-grade appendiceal mucinous neoplasm after pathological examination. Cystic disease in the female pelvis is common. The majority of cystic pelvic masses originate in the ovary, but some other pelvic organs mimic this anomaly. It is important to understand the relationship of the cyst with its anatomic location, to identify normal ovaries at imaging, and to compare the findings with a patient's clinical history to avoid misdiagnosis.