Abstract
A 67-year-old woman receiving treatment for brain infarction and diabetes mellitus had epigastric discomfort. The tumor in the upper abdomen was pointed out by abdominal ultrasonography. Based on abdominal CT, MRI, upper GIU series, endoscopic ultrasonography and agniography, the patient was suspected to have a leiomyosarcoma of the stomach and was operated on. A dark reddish hypervascular tumor located only in the lesser omentum was excised easily. Histologically, it was diagnosed as leiomyosarcoma. Primary leiomyosarcomas of the lesser omentum are rare. Twenty cases of the leiomyosarcoma reported in Japan including this case are reviewed here and possible anatomical geneses are discussed.
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