title: Sonographic diagnosis of acute mastoiditis and subsequent retroauricular abscess in a pediatric cochlear implant recipient: A case report.
abstract: When acute mastoiditis occurs in cochlear implant recipients, it can progress to subsequent retroauricular abscess due to the absence of the external mastoid cortex resulting from mastoidectomy performed for cochlear implantation. The management goal is to control infection while preserving the implanted device. A 2-year-old boy with cochlear implants developed acute mastoiditis and a subsequent retroauricular abscess. The patient underwent a surgical intervention based on the diagnosis made utilizing gray-scale and power Doppler sonography. This case illustrates the diagnostic usefulness of sonography in this rare situation. © 2017 Wiley Periodicals, Inc. J Clin Ultrasound 45:515-519, 2017.
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan.
authors.forename: Hiroshi
authors.identifier: http://orcid.org/0000-0002-9431-3301
authors.initials: H
authors.lastname: Sakaida
authors.affiliation: Department of Otorhinolaryngology, National Mie Hospital, Tsu, Mie, Japan.
authors.forename: Satoko
authors.initials: S
authors.lastname: Usui
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan.
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Matsuda
authors.affiliation: Department of Otorhinolaryngology, National Mie Hospital, Tsu, Mie, Japan.
authors.forename: Sawako
authors.initials: S
authors.lastname: Masuda
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Takeuchi
mesh_terms: D000038:Abscess / Q000150:complications / Q000000981:diagnostic imaging* / Q000188:drug therapy; D000208:Acute Disease; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D002443:Ceftriaxone / Q000627:therapeutic use; D002675:Child, Preschool; D003054:Cochlear Implants; D004423:Ear / Q000000981:diagnostic imaging; D004427:Ear Diseases / Q000150:complications / Q000000981:diagnostic imaging / Q000188:drug therapy; D006801:Humans; D008297:Male; D008416:Mastoid / Q000000981:diagnostic imaging; D008417:Mastoiditis / Q000150:complications / Q000000981:diagnostic imaging* / Q000188:drug therapy; D014463:Ultrasonography / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D002443:Ceftriaxone
keywords: cochlear implant; head and neck; mastoidectomy; mastoiditis; retroauricular abscess; ultrasound