title: Migrating pseudomeningocele causing posterior fossa syndrome.
abstract: We present two cases of spontaneous intracerebellar migration of a pseudomeningocele. This is a rarely reported complication of posterior fossa surgery with possible life threatening cerebellar mass effect. The probable mechanism is a slow but progressive cerebrospinal fluid (CSF) movement (one-way valve mechanism) into the pseudomeningocele with secondary herniation or dissection through a weakened dura into the cerebellum causing progressive or acute cerebellar dysfunction. Evacuation and dural repair with or without CSF shunting or marsupialisation results in resolution of the symptoms.
authors.affiliation: Department of Neurosurgery, University Hospitals Leuven, Leuven, Belgium. lars.dejong@uzleuven.be
authors.forename: Lars
authors.initials: L
authors.lastname: de Jong
authors.forename: Koen
authors.initials: K
authors.lastname: Engelborghs
authors.forename: Jan
authors.initials: J
authors.lastname: Vandevenne
authors.forename: Frank
authors.initials: F
authors.lastname: Weyns
mesh_terms: D001932:Brain Neoplasms / Q000601:surgery; D002289:Carcinoma, Non-Small-Cell Lung / Q000556:secondary / Q000601:surgery; D002526:Cerebellar Diseases / Q000209:etiology* / Q000601:surgery; D003388:Cranial Fossa, Posterior; D005260:Female; D006801:Humans; D008175:Lung Neoplasms; D008588:Meningocele / Q000209:etiology*; D008875:Middle Aged; D018242:Neuroectodermal Tumors, Primitive / Q000601:surgery; D011183:Postoperative Complications / Q000209:etiology* / Q000601:surgery; D019292:Skull Base Neoplasms / Q000556:secondary / Q000601:surgery