Abstract
A 40-year-old woman visited a hospital due to nausea. On computed tomography (CT), the patient had an intra-abdominal mass. She was then referred to our hospital for diagnosis and treatment. Contrast-enhanced CT at our hospital showed two tumors measuring 32×30×12 mm. The tumors were located in the greater omental space. The patient was preoperatively diagnosed with gastrointestinal stromal tumors or lymphoma. Laparoscopic excision of the greater omental tumors was performed. The histopathological diagnosis was hyaline vascular-type Castleman's disease. At 13-month follow-up, no additional signs of Castleman's disease were observed. Castleman's disease is a lymphoid proliferative disorder that most commonly presents as a solitary mass in the mediastinum. An extremely rare case of Castleman's disease in the greater omentum, which has only been reported in 8 cases in the Japanese literature, is presented.
