A 35-year-old woman from Delhi presents with a 4-year history of intermittent foul-smelling ear discharge from the right ear. She denies ear pain or hearing loss. Otoscopy shows a small marginal perforation with scant discharge. Pure tone audiometry is normal. CT temporal bone shows no ossicular erosion or mastoid involvement. The patient is counselled about the risks and opts for surgical repair. Which of the following surgical approaches would be most appropriate?

Explanation

## Clinical Assessment This patient presents with **chronic suppurative otitis media (CSOM) with safe (tubotympanic) disease** — characterized by a **marginal perforation, minimal discharge, no ossicular erosion, and no mastoid involvement**. ### Key Diagnostic Features **High-Yield:** The **marginal (attic) perforation** with **scant discharge** and **normal hearing** indicates **safe CSOM** (tubotympanic disease). **Key Point:** Safe CSOM has a **low risk of intracranial complications** and is amenable to **simple tympanoplasty** without mastoidectomy. ### Pathophysiology: Safe vs. Unsafe CSOM | Feature | Safe (Tubotympanic) | Unsafe (Atticoantral) | |---------|---------------------|----------------------| | **Location** | Anteroinferior (pars tensa) | Posterosuperior (pars flaccida/attic) | | **Perforation type** | Central | Marginal/attic | | **Discharge** | Mucopurulent, scanty | Foul-smelling, profuse | | **Ossicular erosion** | Absent | Present | | **Mastoid involvement** | Absent | Present (sclerotic or pneumatic) | | **Granulation/polyps** | Absent | Present | | **Intracranial risk** | Low | High | | **Management** | Tympanoplasty alone | Mastoidectomy + tympanoplasty | ### Why Endoscopic-Assisted Tympanoplasty? **Clinical Pearl:** Endoscopic-assisted transcanal tympanoplasty is the **modern standard for safe CSOM** because it: 1. **Avoids mastoidectomy** — unnecessary in safe disease 2. **Preserves canal anatomy** — no canal wall down sequelae (chronic drainage, water precautions) 3. **Better visualization** — endoscope provides superior view of marginal perforations and Eustachian tube orifice 4. **High success rate** — 85–95% graft take with endoscopic technique 5. **Faster healing** — transcanal approach with less trauma **Mnemonic: SAFE CSOM = Simple tympanoplasty (S), Avoid mastoidectomy (A), Functional restoration (F), Endoscopic technique (E)** ### Surgical Technique Comparison ```mermaid flowchart TD A[Safe CSOM: marginal perforation, no ossicular erosion]:::outcome --> B{Surgical approach?}:::decision B -->|Postauricular incision| C[Canal wall up ossiculoplasty]:::action B -->|Transcanal endoscopic| D[Endoscopic-assisted tympanoplasty]:::action C --> E[More invasive, longer recovery]:::outcome D --> F[Less invasive, better visualization, faster recovery]:::outcome D --> G[Preferred modern approach]:::action ``` **High-Yield:** Endoscopic-assisted transcanal tympanoplasty is now the **preferred first-line surgical technique** for safe CSOM because it achieves high graft success rates with minimal morbidity. ### Why NOT Postauricular Approach? While postauricular incision with canal wall up ossiculoplasty is a valid approach, it is **more invasive** than necessary for safe CSOM without ossicular erosion. The endoscopic transcanal route offers superior visualization and faster recovery. ## Why the Correct Answer **Endoscopic-assisted tympanoplasty via transcanal route** is most appropriate because: - Safe CSOM requires only tympanoplasty (no mastoidectomy) - Endoscopic technique provides superior visualization of the perforation edge - Transcanal approach avoids postauricular incision and associated morbidity - High graft success rate (85–95%) with minimal complications [cite:Dhingra 8e Ch 16]