本期病例选自AJNRCaseoftheWeek（December8,）
Description:
A53-year-oldwomanwithlowerextremityweakness,paresthesia,andgaitabnormalities
53岁女性，双下肢无力、感觉异常，步态异常。
图A:
图B：
图C：
图D：
Legends:
SagittalT2WI(A)andsagittalT1WI(B)demonstrateanintraspinal,extradural,heterogeneous,predominantlyT1-weightedandT2-weightedhyperintenselesioninthedorsalextradural
