Choroid plexus papilloma containing melanin pigment.
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.
Watanabe
K
K
Department of Neurosurgery, Dokkyo University School of Medicine, Tochigi, Japan.
Ando
Y
Y
Iwanaga
H
H
Ochiai
C
C
Nagai
M
M
Okada
K
K
Watanabe
N
N
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
D008543:Melanins