最好的白癜风治疗医院 http://pf.39.net/bdfyy/bdfyc/150505/4618897.htmlA32-year-oldwomanwithcognitivedeclineandseizuressincelatechildhood.
Pleasereadthefilmfirst,thenthinkaboutthepossiblediagnosis???
Theansweristhis
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Megalencephalicleukoencephalopathywithsubcorticalcysts(MLC)
Megalencephalicleukoencephalopathywithsubcorticalcysts(MLC),alsoknownasVanderKnaapdisease,isanautosomalrecessiveleukoencephalopathywithMLC1geneabnormalities.Macrocephalyisseenduringthefirstyearoflife,withprogressivemotordeteriorationandcognitivedecline.TheclassicMRIfindingsarediffusesymmetricalwhitematterhyperintensityinthecerebralhemispheres(A–C)alongwithsubcorticalcysts,whicharealmostalwayspresentintheanteriortemporalregion(arrowsinC–D).Graymatterisusuallyspared.ThedifferentialdiagnosisofMLCincludesCanavandisease,Alexanderdisease,L-2-hydroxyglutaricaciduria,andmerosin-deficientcongenitalmusculardystrophy.
典型MLC儿童病例一:
图A、B示大脑半球白质广泛异常轻度肿胀,图C、D前颞皮层下囊肿
伴皮质下囊肿的巨脑性脑白质病(Megalencephalicleukoencephalopathywithsubcorticalcysts,MLC),又称VanderKnaap病,是一种罕见病,于年由VanderKnaap等人首次报道。
MLC的致病基因是位于22号染色体长臂上的MLC1基因,遗传方式为常染色体隐性遗传。本病特点:婴儿时期出现巨头畸形,大脑白质变性,轻度神经症状和非常缓慢的功能恶化。
影像学特征:双侧、广泛的幕上白质异常伴颞叶皮质下囊肿;胼胝体、内囊多不受累。
病例二
鉴别诊断:Alexander病,不伴巨颅的囊性脑白质病,消融性脑白质病,Canavan病,戊二酸血症1型。患以上疾病的患者,脑白质病变进展较快,通常在起病后十年内死亡。然而,MLC的神经功能恶化十分缓慢。
治疗方案:支持治疗,物理治疗及特殊教育。
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