Fixation of the stapes footplate in children: A clinical and temporal bone histopathologic study

Edgar Bachor, Tino Just, Charles G. Wright, Hans Wilhelm Pau, Collin S. Karmody

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Objective: To clarify the anatomic characteristics, cause, and surgical outcomes relating to fixation of the stapes footplate in children. Study Design: Retrospective case review and four-center histopathologic study of temporal bones. Setting: Tertiary referral center. Patients: We reviewed charts and histologic specimens from 12 children, aged 7 to 13 years, who underwent surgery for footplate fixation. We also studied stapes footplates in 288 temporal bones from 181 children ranging from newborn (20-44 weeks of gestation) to 13 years of age. Main Outcome Measure: Anomalies of the stapes footplate in children. Results: The average age of diagnosis of hearing loss was 6.6 years. Criteria for a diagnosis of otosclerosis were progression of a conductive hearing loss and an intraoperative finding of fixation of the anterior stapediovestibular joint in five patients. In contrast, a nonhomogeneous, thickened, fixed footplate and the absence of an annular ligament were indicators of congenital fixation in six children. In one child, there was neither new bone from the otic capsule nor any obvious otosclerotic foci. In the temporal bone study, 17 of 181 (9.4%) children had anomalies of the stapes footplates, with ankylosis in 4 (2.2%). In two subjects (1.1%), there was an otosclerotic focus not in contact with the stapes footplate. Conclusion: Children younger than 6 years with various congenital anomalies are more likely to have congenital footplate fixation, which will present intraoperatively as a thickened footplate with a partial or absent annular ligament. Children older than 6 years with progressive conductive hearing loss are more likely to have otosclerosis, which presents as fixation of the anterior stapediovestibular joint. The difference in surgical outcomes is probably related to different degrees of footplate abnormality.

Original languageEnglish (US)
Pages (from-to)866-873
Number of pages8
JournalOtology and Neurotology
Volume26
Issue number5
DOIs
StatePublished - Sep 1 2005

Keywords

  • Children
  • Congenital stapes fixation
  • Otosclerosis
  • Stapes ankylosis
  • Temporal bone histopathology

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Sensory Systems
  • Clinical Neurology

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