Middle Ear Exploration Results in Suspected Otosclerosis Cases Referred to Amir-Almomenin and Golsar Hospitals, Rasht, ۲۰۰۱-۲۰۱۱: Are Ossicular and Footplate Area Anomalies Rare?

Introduction: Otosclerosis is a disease of bony labyrinth. Structural changes in the labyrinth often cause ossicular fixation, and thus conductive hearing loss. The purpose of this study was to evaluate middle ear exploration findings and frequency of ossicular and footplate area anomalies in patients with suspected otosclerosis referred to Amiralmomenin and Golsar Hospitals in Rasht, Iran.   Materials and Methods: In ۴۷ patients undergone middle ear exploration in Amiralmomenin and Golsar hospitals from April ۲۰۰۱ to March ۲۰۱۱, the intraoperative findings, and other data were extracted from the medical records of the patients. The data was analyzed using SPSS ۱۷ software.   Results: Frequency of fixation of stapes, malleus, and incus by age and sex in patients undergoing middle ear exploration showed that stapes had been fixed in ۳۹ patients, malleus in ۶ patients, and incus in ۲۱ patients. Analysis of data showed that there was no significant association between sex and age with fixation of any of ossicles (P>۰/۰۵). Middle ear anomalies were seen in ۱۶ cases (۳۴.۰%). Overhanging of facial nerve in ۴ cases, thick stapedial crura in ۵ cases, and perilymph gusher in ۲ cases were the most frequent anomalies.   Conclusion:  This study show that the results of middle ear explorations in our patients in the north of Iran is somehow different from the typical otosclerotic cases, although the frequency of ossicular anomalies is better to be evaluated and compared in different areas of Iran, and other countries. 

Keywords:

Anomalies , Incus , Malleus , Middle ear exploration , Otosclerosis , Ossicular fixation , Stapes