American Journal of Roentgenology, Vol 127, Issue 1, 139-141
Copyright © 1976 by American Roentgen Ray Society
Computed tomography; the anatomic basis of the zone of diminished density surrounding meningiomas
RM Sigel
and
AV Messina
Computed tomography of meningiomas often demonstrates a zone of diminished density surrounding the actual tumor. This zone may be related to widening of the subarachnoid space, cerebral edema, tissue necrosis, or demyelination. A case is presented in which the anatomic basis of the zone of diminished density was shown on pneumoencephalography and at surgery to be an enlarged subarachnoid space.