Malignant fibrous histiocytoma of the greater omentum.

Fig 1. Intra-operative view of malignant fibrous histiocytoma of greater omentum. A 55-YEAR-OLD CAUCASIAN WOMAN was admitted to our hospital complaining of abdominal pain. Her past medical history was not significant and she had no previous history of abdominal trauma. On physical examination a firm, not-fixed mass about 20 cm in diameter was found in the upper abdomen. Standard blood tests and chest x-rays were normal. Carcinoembryonic antigen, carbohydrate antigen 19-9, and a-fetoprotein levels were normal with only CA125 being increased at 201.9 U/mL (normal, <35 U/mL). Upper gastrointestinal endoscopy showed an extrinsic impression on greater curvature of the stomach with no intraluminal abnormality. Colonoscopy was normal. Abdominal computed tomography showed a solid, large mass occupying the entire upper abdomen with heterogeneous enhancement and some calcified areas. Neither ascites nor uterine or ovarian abnormalities were detected. At laparotomy, a huge tumor originating from the greater omentum was found with no peritoneal spreading or invasion of neighbouring organs (Fig 1). The mass