颅内硬膜外表皮样囊肿(附2例病例报告并文献复习)

目的通过2例少见颅内硬膜外表皮样囊肿的临床特点,进行分析并作文献复习,以提高对本病的认识。方法以2例颅内硬膜外表皮样囊肿的病例资料,进行分析及文献复习。结果2例患者均以头痛就诊,病前无特殊病史。其中1例CT显示为类圆形高密度影,无强化,另1例为低密度的肿块,边缘强化。CT和MRI表现为截然不同的影像特征。2例术前均被误诊,术中所见和术后病理证实为硬膜外表皮样囊肿。结论表皮样囊肿的影像学表现不特异,MRI扫描对于表皮样囊肿的诊断存在一定的局限性,有必要予以仔细鉴别。

Objective Reporting two cases of extradural epidermoid cyst and reviewing the related literature, to improve the cognizing of this rare disease. Methods Two case reports from First Hospital of Shanxi Medical University and literature review. Results Two patients presented with symptoms of headache. , were healthy condition before. Computed tomography （CT） showed a high-density mass in one case without enhance ment, and low-density mass in the other case with rim enhancing. Magnetic resonance imaging （MRI） revealed different signal. At surgery, the lesions were found to be an epidermoid cyst. Conclusion Typical MR imaging and computed tomography findings are neither specific for nor constant with epidermoid cysts. MR imaging has not eliminated the need for a thoughtful, critical approach to differential diagnosis. Diagnosis of epidermoid cysts can be challenging.