胃巨大平滑肌肉瘤临床上较少见,常误诊为胃癌或其它疾病。我院外科收治二例,术前分别误诊为胃癌和巨脾症,现报告如下。例1.男性,35岁,因上腹不适、间隙性柏油便二月余入院,疑溃疡病,既往无溃疡病史。体检:贫血貌,全身浅表淋巴结未触及,心肺(-)。腹平软,剑突下轻压痛,肝脾(-),上中腹部可触及10×12cm的包块。实验室检查:轻度贫血,肝肾功能正常,大便潜血试验强阳性。胸透(-)。X线钡餐检查:胃体上段大弯侧肿瘤(胃癌?)。纤维胃镜检查:胃体大弯侧可见息肉样突起数 Stomach giant leiomyosarcoma is clinically rare and often misdiagnosed as gastric cancer or other diseases. Two cases were treated surgically in our hospital and were misdiagnosed as gastric cancer and splenomegaly before surgery. The report is as follows. Example 1. Male, 35 years old, admitted to hospital for more than two months due to epigastric discomfort, intermittent tarry, suspected ulcer disease, and no past history of ulcer. Physical examination: anemia appearance, no contact with superficial lymph nodes, heart and lung (-). The abdomen was soft, the xiphoid tenderness, the liver and spleen (-), and the upper abdomen touched a mass of 10 x 12 cm. Laboratory tests: Mild anaemia, normal liver and kidney function, and strong fecal occult blood test. Chest (-). X-ray barium meal examination: upper curvature of the stomach body side of the tumor (stomach cancer?). Fiber Gastroscopy: Polypoid Prominences on the Large Bend of the Body