Abstract
A 58-year-old man suffering from schizophrenia was referred to our hospital because of abdominal distension. Abdominal CT scan showed a huge tumor measuring 25.0×23.4×12.4 cm in diameter in the abdominal cavity which was composed of intermingling cystic regions and solid regions. The tumor came into contact with the greater curvature of the stomach and the small bowel was displaced entirely to the posterior side of the tumor. Angiography showed that the tumor was fed by the greater omental branch of the right gastroepiploic artery. The patient was operated on for a suspicion of a tumor of the greater omentum. At surgery we confirmed, the huge tumor that had occupied the entire abdominal cavity and did not come into direct contact with the greater curvature of the stomach. The tumor was considered to originate from the greater omentum. We performed resection of the tumor. The resected specimen was 35×30×18 cm in diameter and weighed 4.2 kg. The tumor had cystic and solid lesions and contained dark red-brown serous fluid. Immunohistochemically, the tumor cells were positive for c-kit, indicating a GIST of the greater omentum.
We present this case of giant GIST originated from the greater omentum, together with a review of the literature.
