title: Pathological case of the month.
authors.affiliation: Department of Pathology, Kantonsspital, CH-5001 Aarau, Switzerland. laeng@ksa.ch
authors.forename: R Hubert
authors.initials: RH
authors.lastname: Laeng
authors.forename: Jody
authors.initials: J
authors.lastname: Stähelin
authors.forename: Patrick
authors.initials: P
authors.lastname: Schaller
authors.forename: André
authors.initials: A
authors.lastname: Arnoux
mesh_terms: D020031:Epstein-Barr Virus Infections / Q000150:complications / Q000473:pathology*; D005158:Facial Paralysis / Q000209:etiology*; D005260:Female; D006801:Humans; D007223:Infant; D008416:Mastoid / Q000601:surgery; D010033:Otitis Media / Q000150:complications / Q000473:pathology*