鞍区少见病变的MR诊断及鉴别诊断

MR diagnosis and differential diagnosis of rare diseases of sellar region

目的:通过分析探讨鞍区少见病变的MR表现特点及其鉴别诊断,提高MR对鞍区病变的诊断准确性。方法:手术病理证实的病例6例,年龄18～61岁。均行MR平扫和增强检查。分析其MR信号特点与周围解剖结构的关系。结果:累及鞍内及鞍上病变1例为下视丘胶质瘤;鞍旁病变2例,为中颅窝鞍旁硬膜型海绵状血管瘤。鞍上病变3例,1例为垂体柄的生殖细胞瘤,2例为胆脂瘤。以上6例病例,5例术前均误诊,1例术前未能正确定性。结论:为提高诊断准确性,减少误诊,应认真分析鞍区病变的MR信号特点及与周围结构的关系,同时加强对少见病的认识。

Objective：To improve the accuracy of MRI diagnosis of sellar region diseases by investigating MR imaging manifestations of sellar region rare diseases and its differential diagnosis. Methods： 6 cases, which proved by pathology, ranging in age from 18 to 61 years, were examined by MR plain scans and MR contrast scans. MR signal manifestations and peripheral invasion were analysesed. Results：There are 1 ease of optic-hypothalamic glioma, which involves intrasellar and suprasellar region; 2 cases of dural cavernous angioma in middle fossa, which located parasellar lesions; 1 ease of germinoma in pituitary stalk and 2 cases of cholesteatoma which located suprasellar region. Among these 6 cases,5cases were misdiagnosis and 1 ease could＇t be qualitation. Conclusion：To improve the accuracy of MRI diagnosis of sellar region diseases, it is necessary to analyses the MR signal manifestations carefully and reeognise of the rare diseases.