title: Pseudo-intraventricular hemorrhage from a deep calcarine fissure.
abstract: Evidence of areas of increased attenuation density within lateral ventricles at computed tomography (CT) of the brain is a finding of acute or subacute intraventricular hemorrhage. The purpose of this case report is to describe a 14-year-old female who presented with an episode of complicated migraine. Brain CT showed an area of high attenuation density (35 Hounsfield Units) in the trigone and occipital horn of the right lateral ventricle, mimicking a blood-fluid level from subacute intraventricular hemorrhage. Magnetic resonance imaging (MRI) of the brain showed that this resulted from gray matter lining a deep calcarine fissure. A deep calcarine fissure may mimic intraventricular hemorrhage at CT. Correct CT and MRI interpretation allows to avoid invasive diagnostic tests including lumbar puncture or intra-arterial catheter angiography.
authors.affiliation: Unit NINT Neuroimaging and Neurointervention, Department of Neurological and Sensorineural Sciences, Azienda Ospedaliera Universitaria Senese, Policlinico "Santa Maria alle Scotte", Viale Mario Bracci, 16, 53100, Siena, Italy, alfonsocerase@gmail.com.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Cerase
authors.forename: Ignazio Maria
authors.initials: IM
authors.lastname: Vallone
authors.forename: Alessandra
authors.initials: A
authors.lastname: Rufa
authors.forename: Sara
authors.initials: S
authors.lastname: Leonini
mesh_terms: D000293:Adolescent; D002543:Cerebral Hemorrhage; D002552:Cerebral Ventricles; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008881:Migraine Disorders / Q000175:diagnosis*; D009778:Occipital Lobe / Q000000981:diagnostic imaging* / Q000473:pathology*; D014057:Tomography, X-Ray Computed / Q000379:methods