Abstract
An 86-year-old woman was admitted to the hospital complaining of vomiting. Abdominal enhanced CT revealed a cystic lesion that extended retroperitoneally from the cecum to the dorsal kidney and diaphragm, and a portion of the cystic wall was enhanced. MRI revealed a 22 cm × 7 cm × 6.5 cm diameter cystic lesion, and found that the ovaries were normal, but not the. The tumor markers CEA and CA19-9 were elevated. Preoperative diagnosis was mucinous cyst adenoma or adenocarcinoma of the appendix. We performed ileocecal resection and removal of the D3 lymph nodes. Macroscopic findings of the resected specimen revealed a giant cystic tumor measuring 25 cm × 9 cm × 8 cm diameter. Histological diagnosis was mucinous cyst adenoma of the appendix. A giant mucinous cyst adenoma extended retroperitoneally is rare. Therefore, we report this case with a review of the literature.
