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目的分析脊髓表皮样囊肿的ＭＲ表现，以提高对该病的神经放射学认识。材料与方法搜集１８例经手术病理证实的脊髓表皮样囊肿。重点分析了肿瘤的好发年龄、部位、ＭＲ信号特点和肿瘤的增强情况。结果在本组病例中，病人年龄最小４岁，最大４２岁，平均年龄２４．５岁。本组病例全部发生于圆锥附近，边缘清楚。大部分肿瘤长度小于２个椎体长度（１６／１８），２例肿瘤长度大于３个锥体长度，Ｔ１加权像肿瘤呈均匀的等（６／１８）、高（２／１８）和混杂信号（１０／１８）。Ｔ２加权像呈高信号，边缘可呈等Ｔ２信号。在７例行增强扫描的病人中，有４例肿瘤周围可见轻微强化，３例无强化。９例肿瘤内可见脂肪信号。本组中未见其他有关先天性畸形。结论脊髓内表皮样囊肿的ＭＲ表现较具特征性。该病多见于青年患者，好发于圆锥附近，多呈长Ｔ１、Ｔ２信号。增强扫描无或仅有周围轻微强化。
Objective To analyze the MR findings of epidermoid cysts in order to improve their neuroradiological understanding. Materials and Methods 18 cases of epidermoid cyst proved by operation and pathology were collected. Focus on analysis of the incidence of tumor age, location, MR signal characteristics and tumor enhancement. Results In this group of patients, the youngest patient is 4 years old, the oldest is 42 years old, the average age is 24.5 years old. All patients in this group occurred near the cone, the edge clear. Most tumors were less than 2 vertebral bodies in length (16/18), 2 tumors were longer than 3 pyramids, T1 weighted images showed homogeneous (6/18), high (2/18) and mixed signals (10/18). T2 weighted image was high signal, the edge can be equal T2 signal. Of the 7 patients who underwent enhanced scan, 4 showed slight enhancement around the tumor and 3 had no enhancement. Fat signals were seen in 9 cases of tumors. No other related congenital malformations in this group. Conclusion The MR findings of intraspinal epidermoid cyst are more characteristic. The disease more common in young patients, occurs in the vicinity of the cone, mostly long T1, T2 signal. Enhanced scan None or only slightly enhanced around.