title: Expanding Virchow Robin spaces in the midbrain causing hydrocephalus.
abstract: We describe a patient who showed cystic lesions in the midbrain and obstructive hydrocephalus. MR imaging features corresponded to abnormal dilatation of perivascular spaces. Similar clinical and MR imaging findings were described in previous reports of patients presenting with mesencephalo-thalamic expanding lacunae; the diagnosis of some of those cases was confirmed at postmortem examination This condition is extremely rare but should be part of a differential diagnosis when evaluating cystic abnormalities in this area of the brain.
authors.affiliation: Department of Neurology, Ramos Mejía Hospital, Buenos Aires, Argentina.
authors.forename: Cristina E
authors.initials: CE
authors.lastname: Papayannis
authors.forename: Patricia
authors.initials: P
authors.lastname: Saidon
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Rugilo
authors.forename: Diego
authors.initials: D
authors.lastname: Hess
authors.forename: Gabriel
authors.initials: G
authors.lastname: Rodriguez
authors.forename: Roberto E P
authors.initials: RE
authors.lastname: Sica
authors.forename: Raul C
authors.initials: RC
authors.lastname: Rey
mesh_terms: D002535:Cerebral Aqueduct / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000134:cerebrospinal fluid / Q000175:diagnosis / Q000209:etiology*; D008279:Magnetic Resonance Imaging; D008636:Mesencephalon / Q000000981:diagnostic imaging / Q000473:pathology*; D008875:Middle Aged; D013788:Thalamus / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed