Methods : High resolution ultrasonography was used to evaluate 6 patients with peripheral nerve sheath tumors of the extremities , among them 4 cases were neurilemmas , 2 cases were neurofibromas .
方法：用高频超声检查了肢体的外周神经鞘类肿瘤6例，其中4例为神经鞘瘤，2例为神经纤维瘤。
neurilemmas