胃平滑肌肿瘤发生率低.其中平滑肌肉瘤占胃恶性肿瘤的1%～3%.一般认为其好发于胃任何部位,但胃体多见.因发生于间叶组织,生长方式及生物学特性特殊,因此早期诊断及确诊率低,直接影响到手术方式的选择及预后.1 生长方式1.1 向腔内生长的粘膜下型.1.2 向腔外生长的浆膜下型.1.3 壁内型.1.4 腔内、腔外型亦称哑铃型. The incidence of gastric smooth muscle tumors is low. Among them, leiomyosarcoma accounts for 1% to 3% of gastric malignant tumors. It is generally considered that it occurs in any part of the stomach, but the gastric body is more common due to the occurrence of mesenchymal tissue, growth patterns and biological characteristics. Special, so the early diagnosis and diagnosis rate is low, directly affect the choice of surgical methods and prognosis. 1. Growth mode 1.1 submucosal growth into the cavity. 1.2 subendicular growth outside the cavity. 1.3 Intramural type. 1.4 Intraluminal, extraluminal type also known as dumbbell type.