COMPLICATION OF SILASTIC DURAL SUBSTITUTE 20 YEARS AFTER DURAL PLASTY

A 63-year-old woman was admitted because of right hemiparesis. Both co mputed tomography scan and magnetic resonance imaging revealed a mass lesion in the left parieto-occipital lobe. Twenty years previously, me ningioma of the left parieto-occipital region was removed at another h ospital, and a dural plasty was performed using a silastic dural subst itute. The patient was operated on under the diagnosis of recurrent me ningioma. However, most of the mass lesion was composed of an old hema toma, which seemed to be a complication of the silastic dural substitu te.