## Diagnosis and Investigation of Nasal Polyps ### Clinical Presentation The patient presents with classic features of nasal polyps: - Bilateral nasal obstruction - Pale, smooth, pedunculated masses on anterior rhinoscopy - Chronic rhinorrhea ### Investigation of Choice: Nasal Endoscopy with Biopsy **Key Point:** Nasal endoscopy is the gold standard investigation for nasal polyps. It provides: 1. Direct visualization of the polyp morphology and location 2. Assessment of bilateral involvement 3. Tissue biopsy for histopathological confirmation 4. Identification of associated conditions (e.g., Aspergillus in fungal polyps, eosinophilic infiltration in allergic polyps) ### Histopathological Findings - **Benign antrochoanal polyps:** Smooth mucosa with intact epithelium, edematous stroma, minimal inflammation - **Allergic fungal sinusitis polyps:** Eosinophilic infiltration, fungal elements, Charcot-Leyden crystals - **Cystic fibrosis-associated polyps:** Eosinophilic inflammation, mucous gland hyperplasia ### Role of Other Investigations | Investigation | Role | Limitation | |---|---|---| | **CT Paranasal Sinuses** | Assesses extent, staging before surgery, rules out malignancy | Does not provide tissue diagnosis; not first-line | | **X-ray PNS** | Limited soft tissue detail | Inferior to CT; rarely used for polyp evaluation | | **Allergy testing** | Identifies allergic triggers | Not diagnostic for polyps; adjunctive only | **Clinical Pearl:** Biopsy is essential to: - Rule out malignancy (rare but critical) - Identify fungal elements (aspergillosis) - Assess for eosinophilic inflammation (allergic polyps, ABPA) - Guide management (e.g., antifungal therapy for fungal polyps) **High-Yield:** Always biopsy nasal masses, even if clinically benign-looking. Unilateral polyps have higher malignancy risk and mandate biopsy. [cite:Scott-Brown's Otorhinolaryngology Ch 6] 
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