title: Dependent layering of contrast medium in cystic astrocytomas.
abstract: Dependent layering of contrast enhanced fluid in cystic astrocytomas has not been described on computed tomograms. Two children in which this phenomenon occurred are described and its significance is discussed. In a third cystic lesion contrast layering was confirmed by head tilting.
mesh_terms: D000293:Adolescent; D001254:Astrocytoma / Q000000981:diagnostic imaging*; D001932:Brain Neoplasms / Q000000981:diagnostic imaging*; D002675:Child, Preschool; D003287:Contrast Media; D005260:Female; D006801:Humans; D007483:Iothalamic Acid; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media; D007483:Iothalamic Acid