title: Focal glial differentiation and oncocytic transformation in choroid plexus papilloma.
abstract: The histiopathological features of a choroid plexus papilloma in a 27-year-old male are described. The tumor displayed marked oncocytic transformation and glial differentiation of the epithelium in areas in which there was also marked sclerosis of the fibrovascular cores. Non-membrane-bound bodies of intermediate filaments characterized ultrastructurally the cells with glial differentiation.
mesh_terms: D000328:Adult; D002471:Cell Transformation, Neoplastic / Q000648:ultrastructure*; D002551:Cerebral Ventricle Neoplasms / Q000032:analysis / Q000648:ultrastructure*; D004806:Ependymoma / Q000032:analysis / Q000648:ultrastructure*; D005904:Glial Fibrillary Acidic Protein / Q000032:analysis; D006801:Humans; D007382:Intermediate Filaments / Q000648:ultrastructure; D008297:Male; D009457:Neuroglia / Q000032:analysis / Q000648:ultrastructure
chemical_list: D005904:Glial Fibrillary Acidic Protein