Abstract
A 34-year-old woman was admitted to our hospital with upper abdominal discomfort in April 2014. She had undergone abdominal tumorectomy at another hospital in 2004. We diagnosed her with a malignant tumor of the greater omentum, and pathology revealed extraskeletal myxoid chondrosarcoma. Contrast-enhanced abdominal computed tomography (CT) revealed a segmented tumor 15 cm in diameter with calcification in the left upper quadrant, compressing the lateral segment of the liver. Two peritoneal nodules invading segment 6 of the liver were also found. A needle biopsy of the left upper quadrant led to a diagnosis of adenoid cystic carcinoma based on positive responses for p63, c-kit, and epithelial membrane antigen immunostaining. These results were histologically and immunopathologically identical to those of the patient's previously resected tumor, and we diagnosed her with recurrence of adenoid cystic carcinoma. Lateral segmentectomy of the liver with diaphragm resection was performed, and the tumors were completely removed. This case is the first report of adenoid cystic carcinoma of the greater omentum.
