朗读老师：章维昆明医院
翻译老师：医院?
?审校老师：姜春医院??
HistoryandMRimages
History:A19-year-oldmanadoptedfromJapanasaninfantreportedatwo-tothree-yearhistoryofprogressiveweaknessaffectingtherightarm.Thepatientnotedstiffnessanddifficultymanipulatingtherighthand.Hedeniedsensorysymptoms.
AnunenhancedMRIofthecervicalspinewasperformed.ShownbelowaresagittalT1-weightedfluid-attenuatedinversion-recovery(FLAIR)andshort-tauinversion-recovery(STIR)images.
病史和MR图像
病史：一名婴儿时期从日本收养的19岁男子，自述2-3年来右臂进行性无力。患者自觉右手僵硬难以控制，否认有感觉方面症状。
行颈椎核磁共振平扫检查。以下为矢状位T1FLAIR和STIR图像。
AdditionalMRimages
AnMRIofthecervicalspinewasperformedinneutralpositionandinflexion.ShownbelowaresagittalT2-weightedsamplingperfectionwithapplication-optimizedcontrastusingdifferentflipangleevolution(SPACE)andaxialT2-weightedimagesinneutralpositionandinflexion.Clicktheimagestoenlarge.
附加MR图像
颈椎MRI在中立位和屈曲位进行。下面所示是中立位和屈曲位矢状T2加权SPACE序列和轴位T2加权图像。
Findingsanddiagnosis
Findings
CervicalMRI(initialpresentation,neutralpositiononly):Straighteningofcervicallordosis;otherwisenormalMRIofthecervicalspine.
CervicalMRI(follow-up,neutralpositionandflexion):Straighteningofcervicallordosis.AnteriordisplacementoftheposteriordurafromC4-C5throughthevisualizedupperthoracicspine,withengorgementofthedorsalepiduralvenousplexus.Thisalmost