title: Cerebellopontine angle subependymoma without fourth ventricle extension: an uncommon tumor in a rare location.
abstract: Subependymomas are benign tumors that occur predominantly in the ventricular system. We describe a case of a 57-year-old man with a large cerebellopontine angle (CPA) tumor which expanded into the jugular foramen. Complete surgical excision of the tumor was achieved through a retrosigmoid approach and the histopathological diagnosis was subependymoma. Subependymomas located exclusively in the CPA without extension into the fourth ventricle are extremely rare. The mainly pathological features and the difficulty in correctly diagnosing these cases preoperatively, even with MRI, are discussed.
authors.affiliation: Division of Neurosurgery, Department of Surgical Specialties, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Brazil. a.m.cunha@uol.com.br
authors.forename: Alexandre Martins
authors.initials: AM
authors.lastname: Cunha
authors.forename: Ana Carolina Gonçalves
authors.initials: AC
authors.lastname: Brito
authors.forename: Gabriela
authors.initials: G
authors.lastname: de Almeida Lima
authors.forename: Luis Alberto
authors.initials: LA
authors.lastname: de Souza
authors.forename: Elington Lannes
authors.initials: EL
authors.lastname: Simões
authors.forename: Carlos
authors.initials: C
authors.lastname: Telles
authors.forename: Nádia
authors.initials: N
authors.lastname: Montagna
mesh_terms: D001932:Brain Neoplasms / Q000175:diagnosis* / Q000601:surgery; D002530:Cerebellopontine Angle / Q000473:pathology / Q000601:surgery; D020546:Fourth Ventricle; D018315:Glioma, Subependymal / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000175:diagnosis* / Q000601:surgery