A 38-year-old man from Delhi presents with a 3-year history of progressive nasal obstruction and recurrent sinusitis. He reports foul-smelling nasal discharge, post-nasal drip, and chronic cough. On nasal endoscopy, multiple smooth, pale, glistening masses are seen bilaterally arising from the lateral nasal wall and extending into the maxillary and ethmoid sinuses. CT PNS shows opacification of bilateral maxillary and ethmoid sinuses with polypoid masses. He has no history of asthma or aspirin sensitivity. Which of the following is the most likely diagnosis?

Explanation

## Clinical Diagnosis: Chronic Rhinosinusitis with Nasal Polyposis ### Key Clinical Features **Key Point:** The presentation of bilateral, smooth, pale, glistening polyps arising from the lateral nasal wall with concurrent maxillary and ethmoid sinus opacification is pathognomonic for chronic rhinosinusitis with nasal polyposis (CRSwNP). ### Distinguishing Features | Feature | CRSwNP | Allergic Fungal Sinusitis | Antrochoanal Polyp | Inverted Papilloma | |---------|--------|---------------------------|-------------------|--------------------| | **Laterality** | Bilateral | Bilateral | Unilateral | Usually unilateral | | **Appearance** | Smooth, pale, glistening | Opaque, tan-brown | Smooth, single | Lobulated, granular | | **Site of origin** | Lateral nasal wall/ostiomeatal complex | Maxillary/ethmoid | Maxillary sinus | Lateral nasal wall | | **Associated findings** | Recurrent sinusitis, post-nasal drip | Allergic history, eosinophilia | Choanal extension | Bone erosion, malignant potential | | **Imaging** | Opacified sinuses with polyps | Hyperdense material (allergic mucin) | Single mass with stalk | Lobulated mass, bone erosion | ### Pathophysiology **High-Yield:** Chronic rhinosinusitis with nasal polyposis results from chronic inflammation of the sinonasal mucosa, leading to edema and polyp formation. The condition is associated with: 1. Chronic eosinophilic inflammation 2. Impaired mucociliary clearance 3. Recurrent bacterial infections 4. Type 2 immune response (IL-5, IL-13 elevation) ### Clinical Presentation - Progressive nasal obstruction (bilateral) - Rhinorrhea and post-nasal drip - Recurrent or chronic sinusitis - Anosmia or hyposmia - Chronic cough (due to post-nasal drip) - **Absence** of asthma or aspirin sensitivity (unlike aspirin-exacerbated respiratory disease) **Clinical Pearl:** While CRSwNP can occur in isolation, it is frequently associated with asthma (30–50% of cases) and aspirin sensitivity (AERD). However, absence of these does not exclude the diagnosis. ### Diagnosis - **Nasal endoscopy:** Bilateral smooth, pale, glistening polyps - **CT PNS:** Opacification of maxillary and ethmoid sinuses with polypoid masses - **Biopsy** (if atypical features): Confirms benign inflammatory polyp ### Management Algorithm ```mermaid flowchart TD A[CRSwNP Diagnosis]:::outcome --> B[Medical Management]:::action B --> C[Topical nasal corticosteroids]:::action B --> D[Saline irrigation]:::action B --> E[Treat underlying conditions]:::action E --> F[Asthma control]:::action E --> G[Allergy management]:::action A --> H{Symptoms persist despite medical therapy?}:::decision H -->|Yes| I[Functional Endoscopic Sinus Surgery]:::action H -->|No| J[Continue medical management]:::action I --> K[Polypectomy + sinus clearance]:::action K --> L[Postoperative topical steroids]:::action ``` **Key Point:** First-line treatment is medical (topical nasal corticosteroids and saline irrigation); surgery is reserved for cases refractory to medical therapy or with severe obstruction. [cite:Bhattacharyya 2009 AAO-HNS Guidelines on Rhinosinusitis]