title: Choroid plexus papilloma containing melanin pigment.
abstract: The authors report a case of a choroid plexus papilloma in the fourth ventricle containing melanin pigment. The pigmented granules in this tumor were positive for Fontana-Masson, periodic acid-Schiff, acid fast and Sudan staining, suggesting that the pigment contained lipofuscin as well as melanin. The possibility that the melanin derived from lipofuscin by "melanization" through pseudoperoxydation is discussed.
authors.affiliation: Department of Neurosurgery, Dokkyo University School of Medicine, Tochigi, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Watanabe
authors.forename: Y
authors.initials: Y
authors.lastname: Ando
authors.forename: H
authors.initials: H
authors.lastname: Iwanaga
authors.forename: C
authors.initials: C
authors.lastname: Ochiai
authors.forename: M
authors.initials: M
authors.lastname: Nagai
authors.forename: K
authors.initials: K
authors.lastname: Okada
authors.forename: N
authors.initials: N
authors.lastname: Watanabe
mesh_terms: D002551:Cerebral Ventricle Neoplasms / Q000737:chemistry* / Q000473:pathology; D005260:Female; D005910:Glioma / Q000737:chemistry* / Q000473:pathology; D006801:Humans; D008543:Melanins / Q000032:analysis*; D008875:Middle Aged
chemical_list: D008543:Melanins