title: Exophytic juvenile pilocytic astrocytomas of the posterior fossa.
abstract: In children, posterior fossa juvenile pilocytic astrocytomas are common tumors. Radiologically, primarily extra-axial brainstem pilocytic astrocytomas are uncommon and extra-axial cerebellar pilocytic tumors are exceptional. We report two cases of such exophytic tumors, contrasting their presentation, imaging appearance, and prognosis. We also report the radiographic features of posterior fossa juvenile pilocytic astrocytomas from a 5-year review of our institutional experience.
authors.affiliation: Saint Louis University Health Sciences Center, Missouri, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Martin
authors.forename: T J
authors.initials: TJ
authors.lastname: Geller
authors.forename: S
authors.initials: S
authors.lastname: Falbo
authors.forename: T
authors.initials: T
authors.lastname: Pittman
mesh_terms: D001254:Astrocytoma / Q000175:diagnosis* / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D015192:Infratentorial Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D011379:Prognosis; D014057:Tomography, X-Ray Computed