title: Pseudotumoural hemicerebellitis: imaging findings in two cases.
abstract: Pseudotumoural hemicerebellitis is exceedingly rare. It may closely resemble a tumour either clinically or on imaging, and a high index of suspicion is required to avoid unnecessary surgical procedures. MRI is the most useful diagnostic tool, and reveals a swollen cerebellar hemisphere, hyperintense in T(2) weighted images. A pattern of predominantly pial contrast enhancement, absence of a well-defined mass and regression of the abnormalities in follow up examinations help to rule out malignancy. We report two cases of pseudotumoural cerebellitis (an 11-year-old girl and a 9-year-old boy) studied with CT and MRI.
authors.affiliation: Radiology Unit, Hospital de Base do Distrito Federal, SMHS 101, Bloco A, Subsolo, CEP 70335-900, Brasilia, DF, Brazil.
authors.forename: J L F
authors.initials: JL
authors.lastname: de Mendonca
authors.forename: H
authors.initials: H
authors.lastname: Barbosa
authors.forename: S L
authors.initials: SL
authors.lastname: Viana
authors.forename: F M O
authors.initials: FM
authors.lastname: Freitas
authors.forename: M A C B
authors.initials: MA
authors.lastname: Viana
authors.forename: A C L
authors.initials: AC
authors.lastname: Ferreira
mesh_terms: D002526:Cerebellar Diseases / Q000175:diagnosis*; D002528:Cerebellar Neoplasms / Q000175:diagnosis; D002648:Child; D003937:Diagnosis, Differential; D004660:Encephalitis / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D014057:Tomography, X-Ray Computed