Antrochoanal Polyp vs Ethmoidal Polyp
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🧠 Differences between Antrochoanal Polyp and Ethmoidal Polyp
| Feature | Antrochoanal Polyp | Ethmoidal Polyp |
|---|---|---|
| Origin | Maxillary sinus (antrum) | Ethmoidal air cells |
| Laterality | Usually unilateral | Typically bilateral |
| Number | Single polyp | Multiple polyps |
| Age Group | More common in children and young adults | More common in adults |
| Direction of Growth | Grows posteriorly toward choana & nasopharynx | Confined to nasal cavity, may reach nares |
| Etiology | Infective | Allergic |
| Shape & Size | Trilobate: antral, nasal, and choanal parts | Grape-like clusters |
| Histology | Lacks eosinophils; edematous stroma | Shows eosinophilic infiltration |
| Endoscopic Appearance | Single smooth pedunculated mass | Multiple glistening grape-like masses |
| CT Scan Findings | Maxillary sinus opacification; widened ostium | Multiple soft-tissue densities in ethmoid region |
| Treatment | Surgical excision (FESS or Caldwell-Luc) | Medical (steroids); Surgery if needed (FESS) |
| Recurrence | Low (if completely excised) | High (if allergy not controlled) |
🧠 Mnemonic to Remember
"A Single Max Choosy Child vs Both Ethical Adults"
▶️ Antrochoanal Polyp:
- A Single → Single polyp
- Max → Arises from Maxillary sinus
- Choosy → Grows toward choana
- Child → Seen in children/young adults
▶️ Ethmoidal Polyp:
- Both → Bilateral
- Ethical → Arises from ethmoid air cells
- Adults → Seen in adults
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