原发肌淋巴瘤罕见。作者报道了6例,并对其临床表现、CT、MR、B超以及病理进行研究。4例肿块发生在臀部和大腿近端,2例发生在肩部和上臂近端。症状为局部肿胀和疼痛,有的为无疼性。可触及孤立或多发的硬性肿块,生长缓慢,也可迅速增大。大多无全身症状。US显示,大多为不均匀低回声,肿块边缘模糊不清,可见纤维间隔变粗大和肌束 Primary lymphoma is rare. The authors reported 6 cases and studied their clinical manifestations, CT, MR, B-mode ultrasonography, and pathology. Four cases occurred in the hip and thigh, and two cases occurred in the shoulder and proximal arm. Symptoms are local swelling and pain, and some are painless. Isolated or multiple rigid lumps can be touched, grow slowly, and can quickly increase. Most have no systemic symptoms. The US showed that most of the patients were inhomogeneously hypoechoic and the edges of the tumors were blurred.