【摘要】 平滑肌肉瘤是起源于平滑肌细胞的恶性间叶组织源性肿瘤，主要发生于血管或内脏，发生于四肢尤其是上肢软组织相对少见。本文报道1例上臂原发性高级别平滑肌肉瘤患者，其二维超声检查表现为左上臂混合回声包块，外形规整，内回声不均质。CDFI显示肿块内见丰富血流信号，频谱呈现低速低阻的动脉频谱，超声应变弹性成像提示肿块质地硬，CEUS示其动脉期呈快速向心性不均匀高增强，静脉期呈不均匀低增强，延迟期逐步消退。本文联合应用以上多种超声技术，对肿块的来源、性质、血流动力学特征及毗邻组织侵犯情况进行多维度、立体化评估，旨在加强对此类疾病的认识。更多还原

【Abstract】 Leiomyosarcoma is a malignant mesenchymal tumor that originates from smooth muscle cells, mainly occurring in blood vessels or internal organs. It is relatively rare in the soft tissues of the extremities, especially the upper limbs. This article reports a case of primary high-grade leiomyosarcoma in the upper arm. The 2D-US image shows a mixed-echo mass in the left upper arm with a regular shape and heterogeneous internal echoes. CDFI reveals abundant blood flow signals within the mass, with a low-velocity and low-resistance arterial spectrum. The ultrasound strain elastography suggests that the mass is hard. CEUS shows rapid and uneven centripetal enhancement in the arterial phase, uneven low enhancement in the venous phase, and gradual fading in the delayed phase. The article combines the application of the above-mentioned multiple ultrasound techniques to conduct a multi-dimensional and three-dimensional assessment of the origin, nature, hemodynamic characteristics and adjacent tissue invasion of the mass, aiming to enhance the understanding of such diseases.更多还原