A 4-year-old boy with Crouzon syndrome presents to the ENT clinic with bilateral ear fullness and recurrent upper respiratory tract infections. Audiometry reveals the pattern marked **A** in the diagram. Which of the following is the MOST COMMON otologic finding responsible for this hearing loss pattern in Crouzon syndrome?
A. Chronic otitis media with effusion and ossicular anomalies
B. Bilateral sensorineural hearing loss from cochlear hypoplasia
C. Normal hearing with normal middle ear function
D. Asymmetric conductive loss from unilateral stapes fixation
Explanation
Why "Chronic otitis media with effusion and ossicular anomalies" is right
Crouzon syndrome causes conductive hearing loss in 50–70% of patients due to multiple otologic abnormalities: chronic middle ear effusions (from Eustachian tube dysfunction secondary to midface hypoplasia), ossicular anomalies (malformation or fixation of the stapes, incus, or malleus), and stenosis of the bony external auditory canal. The pattern marked A (bilateral conductive loss) is the hallmark audiologic finding in Crouzon syndrome. According to Cummings Otolaryngology 7e, Chapter 197, these middle ear and ossicular abnormalities are the primary drivers of the conductive hearing loss observed in this population, and management typically includes tympanostomy tubes for chronic otitis media with effusion.
Why each distractor is wrong
Bilateral sensorineural hearing loss from cochlear hypoplasia: While Crouzon syndrome may rarely present with SNHL (pattern B), sensorineural loss is not the cardinal audiologic finding. The typical pattern is conductive, not sensorineural. Cochlear hypoplasia is not a defining feature of Crouzon.
Asymmetric conductive loss from unilateral stapes fixation: Pattern C (asymmetric mixed loss) is not characteristic of Crouzon syndrome. The hearing loss in Crouzon is typically bilateral and conductive, not asymmetric. Unilateral ossicular pathology would not explain the bilateral presentation seen in 50–70% of patients.
Normal hearing with normal middle ear function: Pattern D (normal) does not apply to this patient. Crouzon syndrome has a high prevalence of conductive hearing loss; normal hearing is not the expected finding and would not account for the patient's symptoms of ear fullness and recurrent infections.
High-YieldNEET PG
Crouzon syndrome → bilateral conductive hearing loss (50–70% prevalence) from OME + ossicular anomalies + external canal stenosis → tympanostomy tubes are first-line management.
Cummings Otolaryngology 7e, Ch 197
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