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周围神经鞘肿瘤不常见,两种主要的良性肿瘤为神经纤维瘤和神经鞘瘤(雪旺氏瘤),恶性肿瘤最常称为恶性周围神经鞘瘤(恶性雪旺氏瘤)。作者报告了22个(17例患者)经组织学证实的此类肿瘤的MR表现。其中雪旺氏瘤12个,神经纤维瘤7个,恶性周围神经鞘瘤3个(2个发生于神经纤维瘤病患者)。平均年龄36岁(14～75岁),女9例,男8例。64%发生于下肢,32%发生于上肢,仅4%发生于前腹壁,最常受累的下肢部位为大腿,大多数肿瘤位于发病肢体的前间隔,5例位于皮下,仅3例位于后间隔,1例丛状神经纤维瘤侵犯多个间隔。在MR图象上,肿瘤的大小为1～24cm,雪旺氏瘤3.6cm,神经纤维瘤3.9cm,恶性者10.6cm,11个肿瘤为卵圆形,10个为梭形,1个丛状
Peripheral nerve sheath tumors are uncommon and the two major benign tumors are neurofibromatosis and schwannoma (Schwannoma), the most commonly referred to as malignant peripheral schwannoma (malignant Schwannoma). The authors reported the MR findings of histologically confirmed tumors in 22 patients (17 patients). Including 12 cases of Schwannoma, 7 neurofibromas, 3 malignant peripheral nerve sheath tumors (2 occurred in patients with neurofibromatosis). The average age of 36 years (14 to 75 years), 9 females, 8 males. 64% occurred in the lower extremity, 32% occurred in the upper extremity, only 4% occurred in the anterior abdominal wall, the most commonly affected lower extremity was the thigh, most of the tumors were located in the anterior limb of the affected limb, 5 in the hypodermis, and only 3 posteriorly , One case of plexiform neurofibroma invaded multiple intervals. In the MR images, the size of the tumor was 1 ~ 24cm, Schwannoma 3.6cm, neurofibroma 3.9cm, malignant 10.6cm, 11 tumors were oval, 10 spindle-shaped, a plexiform