A 35-year-old man from Delhi presents with a 3-year history of persistent ear discharge from the right ear. He reports no fever or systemic symptoms. Otoscopy shows a small central perforation with scanty mucoid discharge. Audiometry reveals a 20 dB air-bone gap. CT temporal bone is normal with no evidence of ossicular erosion or mastoid sclerosis. The patient has been compliant with topical antibiotic drops for 8 weeks without improvement. What is the next step in management?

Explanation

## Clinical Diagnosis: CSOM (Tubotympanic Type) — Candidate for Tympanoplasty ### Key Clinical Features **Key Point:** This patient has **tubotympanic (safe) CSOM** with favorable characteristics: - Small central perforation (not marginal) - Scanty mucoid discharge (not profuse purulent) - Normal ossicular chain (no erosion) - Normal mastoid (no sclerosis) - Minimal air-bone gap (20 dB) - Failed medical management (8 weeks of topical antibiotics) ### Classification of CSOM | Feature | Tubotympanic (Safe) | Atticoantral (Unsafe) | |---------|---------------------|----------------------| | **Perforation site** | Central | Marginal/attic | | **Discharge** | Mucoid, scanty | Purulent, foul-smelling | | **Ossicular erosion** | Absent | Present (malleus, incus) | | **Mastoid** | Pneumatic/normal | Sclerotic, eroded | | **Cholesteatoma risk** | Low | High | | **Management** | Tympanoplasty | Mastoidectomy ± ossiculoplasty | ### Management Algorithm for Tubotympanic CSOM ```mermaid flowchart TD A[CSOM with central perforation]:::outcome --> B{Ossicular erosion?}:::decision B -->|No| C{Medical therapy failed?}:::decision B -->|Yes| D[Mastoidectomy + ossiculoplasty]:::action C -->|Yes| E[Tympanoplasty]:::action C -->|No| F[Continue medical management]:::action E --> G[Hearing restoration + perforation closure]:::outcome ``` ### Why Tympanoplasty is Indicated 1. **Failed medical therapy** — 8 weeks of topical antibiotics without improvement 2. **Central perforation** — amenable to tympanoplasty (safe site) 3. **Intact ossicular chain** — no need for ossiculoplasty 4. **Normal mastoid** — no need for mastoidectomy 5. **Minimal conductive loss** — small air-bone gap suggests minimal ossicular involvement **High-Yield:** **Tympanoplasty is the definitive treatment** for persistent central perforations in CSOM when: - Medical therapy has failed - Ossicular chain is intact - Mastoid is normal - No active suppuration or granulation tissue ### Surgical Technique **Clinical Pearl:** Underlay tympanoplasty using: - Tragal cartilage or temporalis fascia as graft - Microscopic or endoscopic approach - Success rate: 85–95% in uncomplicated cases ### Why Not Continue Medical Therapy? Medical management (topical antibiotics) is indicated for: - Acute otitis media with perforation - Early CSOM with active discharge Once CSOM is established and medical therapy has failed, **surgery is definitive**. Prolonged antibiotic use risks: - Ototoxicity (aminoglycosides) - Bacterial resistance - Delayed definitive treatment **Mnemonic: Tympanoplasty Indications — "SAFE"** - **S**mall central perforation - **A**ctive discharge (failed medical therapy) - **F**ailed conservative management - **E**xact ossicular chain (intact) [cite:Scott-Brown's Otolaryngology Ch 3.9]