Martin等(1960)首先报告6例不同于一般平滑肌肿瘤的胃奇形平滑肌瘤。Stout报告69例此种胃肿瘤,称平滑肌母细胞瘤。瘤细胞多呈圆形或多边形,胞浆嗜伊红,常有核周透明区或胞浆空泡,象上皮细胞,故又名上皮样平滑肌瘤。此瘤多发生于胃肠道,特别好发于胃,也见于消化 Martin et al. (1960) first reported 6 cases of gastric ectasia leiomyomas that were different from general smooth muscle tumors. Stout reported 69 cases of this type of gastric tumor, called smooth muscle blastoma. Tumor cells are mostly round or polygonal, eosinophilic cytoplasm, often perinuclear or cytoplasmic vacuoles, like epithelial cells, it is also known as epithelioid leiomyoma. This tumor occurs in the gastrointestinal tract, especially in the stomach, but also in the digestion