Gastrointestinal stromal tumor of the lesser omentum: report of a case.
We describe herein an extremely unusual case of a gastrointestinal stromal tumor (GIST) of the lesser omentum. A 45-year-old man was admitted to our hospital with an intra-abdominal mass that was subsequently misdiagnosed as a submucosal tumor of the stomach. The tumor arose from the lesser omentum and was removed without difficulty. Histologically, the tumor was composed of spindle-shaped cells with an interlacing bundle pattern, and immunohistochemical examination showed that it was positive for myeloid stem cell antigen (CD34), but negative for HHF35 and S-100 protein. These findings were consistent with a GIST lacking myogenic features and neural attributes. The patient had an uneventful postoperative course, and was free of recurrence when last seen 11 months after his operation.
Fukuda
H
H
Department of Surgery, Omiya Red Cross Hospital, Saitama, Japan.
Suwa
T
T
Kimura
F
F
Sugiura
T
T
Shinoda
T
T
Kaneko
K
K
D005770:Gastrointestinal Neoplasms; D006801:Humans; D008297:Male; D008637:Mesenchymoma / Q000175:diagnosis* / Q000601:surgery; D008875:Middle Aged; D009852:Omentum; D010534:Peritoneal Neoplasms / Q000175:diagnosis* / Q000601:surgery