Treacher Collins syndrome: an otologic challenge

Area of Science:

• Otolaryngology
• Medical Imaging
• Genetics

Background:

• Treacher Collins syndrome is a rare genetic disorder characterized by craniofacial abnormalities.
• Patients often present with significant malformations of the middle and external ear structures.
• These malformations pose considerable challenges for surgical correction and hearing rehabilitation.

Purpose of the Study:

• To evaluate the preoperative computed tomography (CT) findings in patients with Treacher Collins syndrome.
• To assess the surgical difficulties and outcomes in this patient cohort.
• To compare hearing results with those of patients with isolated atresia/stenosis.

Main Methods:

• Retrospective review of 43 patients with Treacher Collins syndrome.
• Analysis of preoperative computed tomography (CT) scans.
• Evaluation of surgical interventions and audiological outcomes for 11 operated patients.

Main Results:

• CT scans consistently revealed underdeveloped temporal bones, absent mastoid pneumatization, and underdeveloped middle ear spaces.
• Ossicular dysjunction was common, with the malleus/incus remnant frequently displaced.
• Severe dysplasia of the stapes-facial nerve complex was a frequent finding, often rendering malformations uncorrectable.
• Hearing results were less predictable compared to isolated atresia/stenosis.

Conclusions:

• Middle ear malformations in Treacher Collins syndrome are complex and often uncorrectable.
• Preoperative CT is crucial for identifying anatomical challenges.
• Surgical outcomes and hearing predictability are significantly poorer than in isolated ear atresia.