title: A 15 year old boy with a posterior fossa tumor.
abstract: A 15 year old male presented with hydrocephalus from a tectal mass obstructing the cerebral aqueduct and upper fourth ventricle. The solid-cystic partly enhancing mass proved to be a pigmented pleomorphic xanthoastrocytoma, the third such example reported. The lesion revealed typical features of a PXA with the unusual addition of intracytoplasmic melanin in select lesional cells. Melanin pigment production is uncommon in glial tumors and of uncertain significance. The present case is recurrence-free one year post-operatively.
authors.affiliation: Department of Clinical Neurologic Sciences, London Health Sciences Center and Schlich School of Medicine and Dentistry, London, Ontario, Canada.
authors.forename: Erin M
authors.initials: EM
authors.lastname: Chapman
authors.forename: Adrianna
authors.initials: A
authors.lastname: Ranger
authors.forename: Donald H
authors.initials: DH
authors.lastname: Lee
authors.forename: Robert R
authors.initials: RR
authors.lastname: Hammond
mesh_terms: D000293:Adolescent; D001254:Astrocytoma / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D006801:Humans; D015192:Infratentorial Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D010858:Pigmentation