Cochlear implant device failure secondary to cholesterol granuloma-mediated cochlear erosion

Ryan Eric Neilan, Karen Pawlowski, Brandon Isaacson, Peter S. Roland

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Study Design: Case report. Setting: A tertiary care pediatric hospital. Patient: A 7-year-old boy complained of retroauricular pain 3.5 years after cochlear implantation. Temporal bone computed tomographic scan revealed a soft tissue density filling the mastoid and middle ear space. There was extensive osseous erosion involving the cochlear promontory that resulted in lateral displacement electrode array into the middle ear space. Intervention: Mastoidectomy with removal of cochlear implant. Results: Pathologic examination of the soft tissue filling the mastoid cavity was consistent with a cholesterol granuloma. The cultures of the mastoid cavity demonstrated no growth. Examination of the explanted device revealed a cell layer covering the length of the electrode. The stylet tract was filled with cells that grew out through the silicone component. No birefringent cholesterol crystals were detected in the tissue surrounding the electrode. Biofilms were not identified. Conclusion: The authors describe a unique case of a cholesterol granuloma of the middle ear and mastoid in a cochlear implant recipient causing erosion of the otic capsule and displacement of the cochlear implant electrode array into the middle ear space.

Original languageEnglish (US)
Pages (from-to)733-735
Number of pages3
JournalOtology and Neurotology
Volume33
Issue number5
DOIs
StatePublished - Jul 2012

Fingerprint

Equipment Failure
Mastoid
Cochlear Implants
Cochlea
Middle Ear
Granuloma
Electrodes
Cholesterol
Cochlear Implantation
Pediatric Hospitals
Temporal Bone
Silicones
Tertiary Healthcare
Biofilms
Capsules
Ear
Pain
Equipment and Supplies
Growth

Keywords

  • Cholesterol granuloma
  • Cochlear implant
  • Device failure

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Clinical Neurology
  • Sensory Systems
  • Medicine(all)

Cite this

Cochlear implant device failure secondary to cholesterol granuloma-mediated cochlear erosion. / Neilan, Ryan Eric; Pawlowski, Karen; Isaacson, Brandon; Roland, Peter S.

In: Otology and Neurotology, Vol. 33, No. 5, 07.2012, p. 733-735.

Research output: Contribution to journalArticle

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