A 38-year-old man from Delhi presents with a 3-year history of progressive nasal obstruction, rhinorrhea, and post-nasal drip. He reports recurrent episodes of sinusitis requiring multiple courses of antibiotics. On nasal endoscopy, bilateral smooth, pale, glistening masses are seen arising from the middle turbinate region, obstructing the nasal airway. CT paranasal sinuses shows opacification of the maxillary and ethmoid sinuses with polypoid masses. He has no history of asthma or allergic rhinitis. What is the most likely diagnosis?

Explanation

## Diagnosis: Chronic Rhinosinusitis with Nasal Polyposis ### Clinical Presentation **Key Point:** Bilateral smooth, pale, glistening polyps in the setting of chronic rhinosinusitis with recurrent sinus infections is pathognomonic for chronic rhinosinusitis with nasal polyposis (CRSwNP). ### Distinguishing Features | Feature | CRSwNP | Antrochoanal Polyp | Inverted Papilloma | |---------|--------|-------------------|-------------------| | **Laterality** | Bilateral (80%) | Unilateral | Usually unilateral | | **Site of origin** | Ethmoid/middle turbinate | Maxillary antrum | Lateral nasal wall | | **Appearance** | Smooth, pale, glistening | Smooth, single stalk | Irregular, granular surface | | **Associated sinusitis** | Yes, chronic | No | No | | **Malignant potential** | Very low | None | High (10–15%) | | **Recurrence rate** | 10–30% | 5–10% | 30–50% | ### Pathophysiology **High-Yield:** CRSwNP results from chronic eosinophilic inflammation and edema of the mucosa, leading to polyp formation. The condition is associated with: - Chronic rhinosinusitis (most common cause) - Allergic rhinitis (though this patient denies it) - Aspirin sensitivity (Samter triad) - Cystic fibrosis (in children) - Eosinophilic granulomatosis with polyangiitis (EGPA) ### Management Algorithm ```mermaid flowchart TD A[Bilateral nasal polyps]:::outcome --> B{Symptoms controlled?}:::decision B -->|Yes| C[Medical management]:::action C --> D[Intranasal corticosteroids] C --> E[Antihistamines if allergic] B -->|No| F{Severe obstruction?}:::decision F -->|Yes| G[Functional Endoscopic Sinus Surgery]:::action F -->|No| H[Optimize medical therapy]:::action G --> I[Polypectomy + ESS] H --> J{Response?}:::decision J -->|Good| K[Continue medical]:::outcome J -->|Poor| L[Consider surgery]:::action ``` ### Investigation Findings - **CT findings:** Bilateral opacification of ethmoid and maxillary sinuses with polypoid masses (as in this case) - **Nasal endoscopy:** Bilateral smooth, pale, glistening masses - **Histology (if biopsied):** Edematous stroma with eosinophilic infiltration, intact epithelium ### Treatment Approach **Key Point:** First-line treatment is medical (intranasal corticosteroids). Surgery is reserved for: 1. Failure of medical management 2. Severe nasal obstruction 3. Complications (sleep apnea, chronic sinusitis unresponsive to therapy) **Clinical Pearl:** Intranasal mometasone or fluticasone propionate for 3–6 months should be tried before considering surgery. Recurrence after surgery is common (10–30%), requiring long-term topical steroid maintenance. **Mnemonic:** CRSWNP features = **BEEPS** - **B**ilateral polyps - **E**thmoid/middle turbinate origin - **E**osinophilic inflammation - **P**ale, smooth appearance - **S**inusitis (chronic underlying) [cite:Scott-Brown's Otorhinolaryngology 8e Ch 34]