title: Histiocytosis mimicking a pineal gland tumour.
abstract: We report an unusual case of isolated Langerhans cell histiocytosis of the central nervous system. A 19-year-old man presented with an incomplete ocular palsy. MRI revealed a solitary mass in the pineal gland with marked contrast enhancement. Complete microsurgical excision was followed by local radiotherapy. Histological examination revealed histiocytosis. Unifocal brain involvement by histiocytosis X is rare with few cases in the literature; the most commonly involved areas are the hypothalamus and the pituitary gland.
authors.affiliation: Department of Neuroradiology, University of Essen, Germany. elke.gizewski@uni-essen.de
authors.forename: E R
authors.initials: ER
authors.lastname: Gizewski
authors.forename: M
authors.initials: M
authors.lastname: Forsting
mesh_terms: D001932:Brain Neoplasms / Q000150:complications / Q000175:diagnosis*; D003937:Diagnosis, Differential; D015614:Histiocytosis / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010870:Pineal Gland / Q000473:pathology*; D010871:Pinealoma / Q000150:complications / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed