PRIMARY LIPOSARCOMA OF THE STOMACH: A RARE MESENCHYMAL TUMOR

Gastric liposarcoma is very rare such that only a few cases have been reported to date. We present a case of a 62 - year - old diabetic man who presented with epigastric pain, vomiting, constipation and melena. The physical examination was unremarkable. By computed tomography (CT), a large mass with low attenuation value was seen in the left abdominal cavity. Histologic examination of a gastric biopsy was nondiagnostic. The patient underwent subtotal gastrectomy. On microscopic examination, the tumor showed features of a benign lipoma but with a distinctive capillary network and dense fibrotic areas. In immunohistochemial staining, positive S 100 and negative CD 117 reactions were seen, and less than 1 % Ki67 positive cells could be found. These findings suggested a highly differentiated gastric liposarcoma.