橄榄体桥脑小脑萎缩的MRI诊断

The diagnose of olivopontocerebellar atrophy(OPCA) with MRI

目的探讨OPCA的MRI的诊断价值。方法回顾总结22例OPCA典型的MRI表现。结果22例病例橄榄体桥脑、小脑半球及蚓部明显萎缩。周围脑室、脑池、脑沟明显扩大。11例桥脑下份"十字交叉"形长T_2信号。4例小脑中脚长T2信号。3例合并轻度脑萎缩。结论OPCA的MRI表现具有特征性,能作出正确诊断。

Objective To evaluate the value of MRI in diagnosing OPCA （Olivopontocerebellar atrophy）. Methods MRI findings of 22 cases with typical OPCA were analyzed retrospectively. Results Images of all cases with OPCA showed widening of pontine cistern, fourth ventricle and sulcus of cerebellum, thinning of the medulla olive nucleus, pens and cerebellar hemisphere and vermis. The basis pontiac ＂cross sign＂ of long T2W signal were found in 1 lcases. Long T2W signal patchy lesion was found in cerebellar middle peduncle in 4 cases. 3 cases combined with slight atrophy of cerebral hemisphere. Conclusion MRI findings of OPCA were characteristic, and the diagnosis of OPCA can be correctly established based on MRI features.