平滑肌肉瘤是来源于平滑肌细胞或由其分化的间叶细胞的一种恶性肿瘤。本文对经手术病理证实的20例腹腔平滑肌肉瘤进行了回顾分析,较详细地总结了其声像特征,指出其内部突出的不纯一的复合回声像有病理基础可循。本文尚分析了超声定位诊断率低的几个因素,并提出了应用超声检查对腹腔平滑肌肉瘤进行定位诊断时应注意的方法及要点。 Leiomyosarcoma is a malignant tumor derived from smooth muscle cells or mesenchymal cells differentiated therefrom. This article retrospectively analyzed 20 patients with peritoneal leiomyosarcoma confirmed by operation and pathology, and summarized the sonographic features in detail. It pointed out that the prominent internal echogenic echogenic image had pathological basis. This article has also analyzed several factors of low diagnostic rate of ultrasound, and put forward the methods and points that should be paid attention to in the diagnosis of abdominal leiomyosarcoma using ultrasound.