title: Lumbar subdural cerebrospinal fluid collection with acute cauda equina syndrome after posterior fossa decompression for Chiari malformation Type I: case report.
abstract: This report describes the circumstances of a patient with a cauda equina syndrome due to the development of a lumbar subdural CSF collection with ventral displacement of the cauda equina shortly following posterior fossa decompression for Chiari malformation Type I (CM-I). This unusual, but clinically significant, complication was successfully treated with percutaneous drainage of the extraarachnoid CSF collection. Although there are a few cases of intracranial subdural hygroma developing after surgery for CM-I, often attributed to a pinhole opening in the arachnoid, as far as the authors can determine, a spinal subdural hygroma associated with surgery for CM-I has not been recognized.
authors.affiliation: Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia.
authors.forename: Houssein A
authors.initials: HA
authors.lastname: Darwish
authors.affiliation: Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia.
authors.forename: Edward H
authors.initials: EH
authors.lastname: Oldfield
mesh_terms: D000328:Adult; D001139:Arnold-Chiari Malformation / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D019299:Decompression, Surgical / Q000009:adverse effects* / Q000379:methods; D004322:Drainage / Q000379:methods; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging; D011128:Polyradiculopathy / Q000000981:diagnostic imaging / Q000209:etiology* / Q000628:therapy; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000628:therapy; D013353:Subdural Effusion / Q000000981:diagnostic imaging / Q000209:etiology* / Q000628:therapy; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging
keywords: CM-I = Chiari malformation Type I; Chiari malformation Type I; cauda equina; congenital; deformity; lumbar subdural CSF collection; suboccipital craniectomy