A59yearoldwomanwit


A59-year-oldwomanwithnewlydiagnosedsquamouscellcarcinomaofthelung

A

B

C

Whatisyourdiagnosis?

TheanswerisAtreticParietalCephalocele

Atreticcephaloceleisatruecephalocelethatconsistsofdura,fibroustissue,anddysplasticbraintissue.Theclassicimagingfeaturesmayincludeawell-definedcalvarialdefect(longarrowinA)withanadjacentroundscalplesionwithlowT1signal(shortarrowinA),heterogeneousT2signal(arrowinB),andnoenhancementatthemedianparietalconvexity.Anupward-pointingprimitivefalcineveinreplacesthestraightsinus(asterisk).Topdifferentialsincludedermoid/epidermoidcysts,whichtypicallyhavehighsignalonT1-anddiffusion-weightedimages.Sinuspericraniitypicallyhasvascularenhancement.Moreaggressivelesionssuchasmetastasesusuallyhaveac







































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