【摘要】 目的探讨少见部位神经鞘瘤的临床影像学表现。方法回顾分析35例经病理学诊断的少见部位神经鞘瘤的CT和MRI表现。结果 CT表现为类圆形或分叶状低密度或等低混杂密度灶。绝大多数（31/35）边界清楚,其中实性肿瘤12例,囊实性病灶18例,单纯囊性病灶5例。CT增强扫描肿瘤实质呈渐进性不均匀强化。囊性病灶内存在强化程度不一的结节灶是囊实性神经鞘瘤较为特征性的表现。实性病灶呈"同心圆样"强化是实性神经鞘瘤比较有价值的征象。MRI上肿瘤实质部分呈稍长T₁、稍长T₂信号,囊性部分呈长T₁、长T₂信号,病灶周围可见水肿信号;"靶征"是特征性的MRI表现。结论不典型神经鞘瘤可发生在身体任何部位,熟悉其影像学特点对诊断很有帮助。更多还原

【Abstract】 Objective To study the imaging characteristics of schwannoma in uncommon locations.Methods CT and MRI of 35 patients with pathologically confirmed schwannomas in uncommon locations were retrospectively analyzed.Results CT showed round or lobular masses with low- to iso-densities with distinct boundaries（31/35）.The lesions were solid（12）,cystic-solid（18）,or cystic（5） with gradual concentric contrast enhancement in the solid components,On MRI,the solid components were slightly T₁- hypointense and slightly T₂-hyperintense whereas the cystic components were T₁-hypointense and T₂-hyperintense.There was surrounding edema.The ’target sign’ appears characteristic.Conclusion Schwannoma can be found in any location of the body.Familiarity with the imaging characteristics is helpful for diagnosis.更多还原