CAJ | 학술논문

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。
목적：탐토소견부위신경초류적림상영상학표현。방법회고분석35례경병이학진단적소견부위신경초류적CT화MRI표현。결과 CT표현위류원형혹분협상저밀도혹등저혼잡밀도조。절대다수（31/35）변계청초，기중실성종류12례，낭실성병조18례，단순낭성병조5례。CT증강소묘종류실질정점진성불균균강화。낭성병조내존재강화정도불일적결절조시낭실성신경초류교위특정성적표현。실성병조정“동심원양”강화시실성신경초류비교유개치적정상。MRI상종류실질부분정초장T1、초장T2신호，낭성부분정장T1、장T2신호，병조주위가견수종신호；“파정”시특정성적MRI표현。결론불전형신경초류가발생재신체임하부위，숙실기영상학특점대진단흔유방조。
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.