A 52-year-old man presents with progressive bilateral hearing loss over 6 months. Otoscopy is normal. Weber test shows lateralization to the right ear, and Rinne test shows bone conduction better than air conduction bilaterally. Pure tone audiometry confirms sensorineural hearing loss. He denies tinnitus, vertigo, or otalgia. What is the most appropriate next step in management?

Explanation

## Clinical Approach to Bilateral Sensorineural Hearing Loss **Key Point:** The stem contains a critical internal contradiction: Rinne test shows bone conduction > air conduction **bilaterally**, which is the pattern of **conductive** hearing loss — yet the stem states pure tone audiometry confirms **sensorineural** hearing loss. In true SNHL, air conduction is better than bone conduction (Rinne positive). This logical inconsistency aside, the clinical scenario as a whole (progressive bilateral SNHL, normal otoscopy, 6-month course, no acute red flags, no asymmetry on audiometry) most closely fits **symmetric bilateral SNHL**, for which the most appropriate next step is **referral to audiology for hearing aid fitting and counseling**. ### Diagnostic Reasoning The patient has: - Progressive bilateral SNHL confirmed on pure tone audiometry - Normal otoscopy (rules out conductive causes) - 6-month progressive (not sudden/acute) course - No tinnitus, vertigo, or otalgia (no retrocochlear red flags) **High-Yield:** The standard management algorithm for **bilateral symmetric progressive SNHL** in an adult without red flags (sudden onset, asymmetry on audiometry, associated neurological symptoms) is **audiological rehabilitation with hearing aids** — not immediate imaging. ### When Is Imaging Indicated? | Indication | Imaging of Choice | |---|---| | Unilateral or asymmetric SNHL (>10–15 dB difference) | MRI internal auditory canals | | Sudden SNHL | MRI to exclude retrocochlear lesion | | Associated neurological symptoms | MRI brain | | Suspected NF2 (bilateral acoustic neuromas) | MRI | **Clinical Pearl:** Per AAO-HNS guidelines, MRI (not HRCT) is the preferred modality for retrocochlear pathology (acoustic neuroma/vestibular schwannoma). HRCT is used for osseous/middle ear pathology. In this patient with bilateral symmetric progressive SNHL and no red flags, imaging is **not** the immediate next step. ### Why Not the Other Options? - **Option B (HRCT temporal bones):** HRCT evaluates bony structures and is not the appropriate modality for retrocochlear pathology. Moreover, imaging is not mandated in bilateral symmetric progressive SNHL without red flags. - **Option C (Oral corticosteroids):** Indicated for **sudden** SNHL (onset within 72 hours). This patient has a 6-month progressive course — corticosteroids are not indicated. - **Option D (Observe and repeat audiometry in 3 months):** Inappropriate when the diagnosis is already confirmed and the patient has functional hearing loss requiring rehabilitation. **Mnemonic:** **Bilateral Symmetric Progressive SNHL → Audiology First.** Reserve imaging for asymmetric, sudden, or neurologically associated SNHL. [cite: Dhingra ENT 8e Ch 7; AAO-HNS Clinical Practice Guideline: Sudden Hearing Loss; Scott-Brown's Otorhinolaryngology 8e]