title: Pediatric case of the day. Infected fourth branchial pouch sinus with an extensive complicating cervical and mediastinal abscess and left-sided empyema.
authors.affiliation: Department of Radiology, British Columbia's Children's Hospital, Vancouver, Canada.
authors.forename: M J
authors.initials: MJ
authors.lastname: Murdoch
authors.forename: J A
authors.initials: JA
authors.lastname: Culham
authors.forename: D A
authors.initials: DA
authors.lastname: Stringer
mesh_terms: D000038:Abscess / Q000000981:diagnostic imaging / Q000209:etiology*; D001934:Branchial Region / Q000002:abnormalities* / Q000000981:diagnostic imaging; D001935:Branchioma / Q000150:complications* / Q000000981:diagnostic imaging*; D004653:Empyema / Q000000981:diagnostic imaging / Q000209:etiology*; D006258:Head and Neck Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging*; D006801:Humans; D007223:Infant; D008297:Male; D008477:Mediastinal Diseases / Q000000981:diagnostic imaging / Q000209:etiology*; D011859:Radiography