title: MR Imaging of pial melanosis secondary to a posterior fossa melanotic ependymoma.
abstract: A 36-year-old man presented with trouble speaking and bilateral progressive hearing loss. MR imaging and histopathologic results revealed a posterior fossa melanotic ependymoma. Pial surfaces appeared hyperintense on T1-weighted images and hypointense on T2-weighted images. Histopathologic examination revealed that tumor cells and interstitial spaces had abundant melanin accumulation. There was no evidence of hemosiderin in tumor cells and in interstitial spaces. Pial melanin accumulation secondary to a posterior fossa melanotic ependymoma explained our MR findings.
authors.affiliation: Division of Neuroradiology, Department of Radiology, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey.
authors.forename: Sait
authors.initials: S
authors.lastname: Albayram
authors.forename: Efsun
authors.initials: E
authors.lastname: Urger
authors.forename: Buge
authors.initials: B
authors.lastname: Oz
authors.forename: Ali
authors.initials: A
authors.lastname: Kafadar
authors.forename: Civan
authors.initials: C
authors.lastname: Islak
authors.forename: Naci
authors.initials: N
authors.lastname: Kocer
mesh_terms: D000328:Adult; D002493:Central Nervous System Diseases / Q000175:diagnosis* / Q000209:etiology*; D004806:Ependymoma / Q000150:complications*; D006801:Humans; D015192:Infratentorial Neoplasms / Q000150:complications*; D008279:Magnetic Resonance Imaging; D008297:Male; D008548:Melanosis / Q000175:diagnosis* / Q000209:etiology*; D010841:Pia Mater