title: Orbital sinus histiocytosis: MR appearance.
abstract: This case report describes the appearance of orbital sinus histiocytosis by magnetic resonance (MR) imaging. Four years after the remission of unilateral cervical adenopathy due to sinus histiocytosis, a 6-year-old girl developed orbital sinus histiocytosis with extension into the middle cranial fossa. Computed tomography demonstrated a homogeneously enhancing lesion; on MR, this tumor was isointense to gray matter on T1-weighted, proton density, and T2-weighted images. Vascular embarrassment was clearly shown by MR.
authors.affiliation: Department of Radiology, LeBonheur Children's Medical Center, Memphis, TN 38103.
authors.forename: E M
authors.initials: EM
authors.lastname: Burton
authors.forename: M
authors.initials: M
authors.lastname: Hickman
authors.forename: T F
authors.initials: TF
authors.lastname: Boulden
authors.forename: R E
authors.initials: RE
authors.lastname: Joyner
authors.forename: M B
authors.initials: MB
authors.lastname: Tierney
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008206:Lymphatic Diseases / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D009918:Orbital Neoplasms / Q000175:diagnosis*