Enlarged cisternae magnae and posterior fossa cysts simulating Dandy-Walker syndrome on computed tomography.
Computed tomography was performed on 5 children with posterior fossa cystic abnormalities. On an axial tomogram, an enlarged cisterna magna could not be distinguished from a Dandy-Walker variant, nor could an encysted fourth ventricle be distinguished from a subarachnoid cyst. Supplementary air encephalography or sagittal reconstruction of tomograms is necessary to define posterior fossa cysts accurately.
D000293:Adolescent; D001927:Brain Diseases / Q000000981:diagnostic imaging; D002675:Child, Preschool; D002946:Cisterna Magna / Q000000981:diagnostic imaging*; D003388:Cranial Fossa, Posterior / Q000000981:diagnostic imaging*; D003560:Cysts / Q000000981:diagnostic imaging*; D003616:Dandy-Walker Syndrome / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging*; D007223:Infant; D008297:Male; D012886:Skull / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed