title: 'Subarachnoid cyst' after evacuation of chronic subdural hematoma: Case report of an unusual postoperative morbidity.
abstract: Burr-hole drainage of chronic subdural hematomas are routine operative procedures done by neurosurgical residents. Common postoperative complications include acute epidural and/or subdural bleeding, tension pneumocephalus, intracranial hematomas and ischemic cerebral infarction. We report an interesting post-operative complication of a 'subarachnoid cyst' after burr-hole evacuation of a chronic subdural hematoma. The authors hypothesize that the 'cyst' is likely secondary to the splitting of the adjacent neomembrane within its arachnoid-brain interface by iatrogenic irrigation of the subdural space. Over time, this 'cyst' develops into an area of gliosis which eventually causes long-term scar epilepsy in the patient. As far as we are aware, this is the first complication of such a 'subarachnoid cyst' post burr-hole drainage reported in the literature.
authors.affiliation: Department of Neurosurgery, National Neuroscience Institute, Singapore.
authors.forename: Low Y Y
authors.initials: LY
authors.lastname: Sharon
authors.affiliation: Department of Neurosurgery, National Neuroscience Institute, Singapore.
authors.forename: N G
authors.initials: NG
authors.lastname: Wai Hoe
keywords: Burr-hole craniotomy; chronic subdural hematoma; subdural membrane