A 28-year-old man from rural Maharashtra presents with a 6-month history of foul-smelling purulent discharge from the left ear following an episode of acute otitis media 8 months ago. He reports conductive hearing loss and occasional ear pain. Otoscopy reveals a large central perforation with granulation tissue and polyps in the external auditory canal. Pure tone audiometry shows air-bone gap of 35 dB. High-resolution CT temporal bone shows erosion of the ossicles and sclerotic mastoid bone. Which of the following is the most appropriate next step in management?

Explanation

## Clinical Assessment This patient presents with **chronic suppurative otitis media (CSOM) with unsafe (atticoantral) disease** — evidenced by granulation tissue, polyps, ossicular erosion, and sclerotic mastoid on imaging. ### Key Diagnostic Features **High-Yield:** The presence of **granulation tissue and polyps** in the canal, combined with **ossicular erosion** on CT, indicates **unsafe CSOM** (also called atticoantral disease or cholesteatomatous CSOM). **Key Point:** Unsafe CSOM requires **surgical intervention** — medical management alone is insufficient and carries risk of intracranial complications (meningitis, brain abscess, sigmoid sinus thrombosis). ### Management Algorithm ```mermaid flowchart TD A[CSOM with ossicular erosion + granulation tissue]:::outcome --> B{Canal wall status?}:::decision B -->|Intact canal, limited disease| C[Canal wall up: Tympanoplasty + ossiculoplasty]:::action B -->|Eroded canal or extensive disease| D[Canal wall down: Cortical mastoidectomy]:::action D --> E[Remove disease, exteriorize epitympanum]:::action E --> F[Ossiculoplasty if residual CHL]:::action C --> G[Lower recurrence, better hearing]:::outcome D --> H[Higher recurrence control, permanent perforation]:::outcome ``` ### Why Canal Wall Down (CWD) Approach? 1. **Ossicular erosion** = structural compromise; canal wall up risks residual disease 2. **Sclerotic mastoid** = limited pneumatization; CWD provides better disease eradication 3. **Granulation + polyps** = aggressive disease requiring wide exteriorization 4. **Ossiculoplasty** can be performed in same stage to address conductive loss **Clinical Pearl:** In unsafe CSOM with ossicular erosion and sclerotic bone, cortical mastoidectomy with canal wall down offers the **lowest recurrence rate (< 5%)** and allows **staged ossiculoplasty** for hearing rehabilitation. ### Comparison: CWU vs. CWD | Feature | Canal Wall Up (CWU) | Canal Wall Down (CWD) | |---------|-------------------|----------------------| | **Indications** | Limited disease, intact canal | Ossicular erosion, extensive disease | | **Recurrence** | 10–40% (residual/recurrent) | < 5% | | **Hearing** | Better (ossicular chain preserved) | Permanent CHL (~30 dB) | | **Complications** | Residual disease, repeat surgery | Chronic drainage, water precautions | | **This case** | Not suitable (ossicular erosion) | **Indicated** | **High-Yield:** Ossicular erosion is a **contraindication to CWU** — the structural damage cannot be reversed, and CWU leaves residual disease risk. ## Why the Correct Answer **Cortical mastoidectomy with canal wall down approach and ossiculoplasty** is the gold standard for unsafe CSOM with ossicular erosion because it: - Eradicates disease with minimal recurrence - Allows staged ossiculoplasty for hearing restoration - Addresses both the infection and the conductive loss [cite:Dhingra 8e Ch 16]