A 28-year-old man from rural India presents with a 3-year history of recurrent ear discharge and progressive hearing loss in the left ear. He reports occasional vertigo and facial twitching. Otoscopy shows a whitish mass protruding from the posterosuperior quadrant with a perforation. Pure tone audiometry shows conductive hearing loss with air-bone gap of 40 dB. CT temporal bone reveals erosion of the lateral semicircular canal and facial canal dehiscence. What is the most appropriate next step in management?

Explanation

## Management of Complicated Cholesteatoma ### Clinical Context: Erosive Cholesteatoma with Complications **Key Point:** Cholesteatoma with bone erosion involving the semicircular canal (SCC) and facial canal is a surgical emergency requiring definitive mastoidectomy, not conservative management. ### Why This Case Requires Surgery **High-Yield:** Indications for surgical intervention in cholesteatoma: 1. **Active disease** (discharge, granulation, ossicular erosion) 2. **Complications** — labyrinthine fistula, facial nerve involvement, intracranial extension 3. **Recurrent disease** after previous surgery 4. **Conductive hearing loss** with ossicular erosion This patient has **ALL of the above**. ### Surgical Approaches | Approach | Indication | Advantage | Disadvantage | |----------|-----------|-----------|---------------| | **Canal Wall Up (CWU)** | Small disease, no complications | Preserves ear canal anatomy, normal hearing potential | Higher recurrence (10–40%), risk of residual disease | | **Canal Wall Down (CWD)** | Large disease, complications, SCC/facial nerve erosion | Lower recurrence (<5%), definitive disease control | Permanent conductive hearing loss, chronic drainage risk, water precautions | | **Endoscopic-assisted** | Erosive disease with canal involvement | Better visualization, reduced morbidity, improved ossiculoplasty success | Requires endoscopic expertise | **Clinical Pearl:** Lateral semicircular canal (LSCC) erosion is a **relative contraindication to canal wall-up surgery** because the fistula increases recurrence risk. Canal wall-down with ossiculoplasty is safer. ### Why Ossiculoplasty Is Included The patient has: - Conductive hearing loss (air-bone gap 40 dB) - Ossicular erosion (implied by imaging and hearing loss) - Active disease requiring mastoidectomy Simultaneous ossiculoplasty (PORP/TORP) restores hearing and is standard in CWD surgery. ### Endoscopic-Assisted Advantage **High-Yield:** Endoscopic-assisted mastoidectomy allows: - Better visualization of sinus tympani and facial recess (common residual disease sites) - Reduced canal wall removal (hybrid approach) - Improved ossiculoplasty outcomes - Lower revision rates This is the modern standard for complicated cholesteatoma in tertiary centers.