title: Plasma-cell granuloma of the fourth ventricle. Case report.
abstract: The case is presented of a 36-year-old woman with a plasma-cell granuloma arising in the fourth ventricle. The mass appeared on computerized tomography as a well circumscribed area of slightly high density that was markedly enhanced with contrast medium. Microscopic examination showed a mixed-cell population with a predominance of plasma cells, and the tumor was characterized immunohistochemically by polyclonal plasma-cell proliferation.
mesh_terms: D000328:Adult; D001927:Brain Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002552:Cerebral Ventricles; D005260:Female; D006099:Granuloma / Q000473:pathology*; D006104:Granuloma, Plasma Cell / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007124:Immunoenzyme Techniques; D008854:Microscopy, Electron; D010950:Plasma Cells / Q000648:ultrastructure; D014057:Tomography, X-Ray Computed