title: Posterior fossa pseudotumour due to viral encephalitis in a child.
abstract: A 14-year-old boy had a 1-month history of diplopia (due to a VI nerve palsy), motor ataxia and dizziness. Brain MRI showed a 1.5-cm mass posterior to the pons. Histopathological examination of a biopsy specimen showed the lesion to be of viral origin. After 3 months, the ataxia and dizziness had resolved and the MRI findings returned to normal. By 5 months the abducens paralysis had also resolved. Viral encephalitis should be considered in the differential diagnosis of posterior fossa tumours.
authors.affiliation: Department of Pediatrics, Dokuz Eylül University Hospital, 35340 Inciralti-Izmir, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Unsal
authors.forename: N
authors.initials: N
authors.lastname: Olgun
authors.forename: F
authors.initials: F
authors.lastname: Sarialioğlu
authors.forename: N
authors.initials: N
authors.lastname: Cevik
mesh_terms: D000293:Adolescent; D001254:Astrocytoma / Q000175:diagnosis; D001706:Biopsy; D001932:Brain Neoplasms / Q000175:diagnosis; D001933:Brain Stem / Q000473:pathology*; D003388:Cranial Fossa, Posterior; D003951:Diagnostic Errors; D018792:Encephalitis, Viral / Q000150:complications* / Q000175:diagnosis; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011559:Pseudotumor Cerebri / Q000175:diagnosis / Q000821:virology*