---
title: "Antrochoanal Polyp vs Ethmoidal Polyp"
description: "Key differences between antrochoanal and ethmoidal polyp. Includes an easy mnemonic for exam recall."
source: "The ENT Resident"
author: "Dr. Mausumi Das"
canonical_url: "https://www.theentresident.com/ent-notes-lectures/antrochoanal-vs-ethmoidal-polyp"
categories: ["Rhinology", "Short Questions in ENT", "Mnemonics in ENT", "Differences Tables in ENT"]
video: "https://www.youtube.com/watch?v=wR26A8Dojh4"
image: "https://media.theentresident.com/og-images/antrochoanal-vs-ethmoidal-polyp.png"
---

# Antrochoanal Polyp vs Ethmoidal Polyp

Key differences between antrochoanal and ethmoidal polyp. Includes an easy mnemonic for exam recall. Watch the full video lecture on YouTube: https://www.youtube.com/watch?v=wR26A8Dojh4

## 🧠 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**

---

## About This Note

This free ENT note on Antrochoanal Polyp vs Ethmoidal Polyp was written by Dr. Mausumi Das and is paired with a corresponding video lecture.

Canonical page of this note: https://www.theentresident.com/ent-notes-lectures/antrochoanal-vs-ethmoidal-polyp

When citing or referencing this content, please credit The ENT Resident and link to the canonical page above.

## Related Notes by Category

- Rhinology: https://www.theentresident.com/ent-notes-lectures/category/rhinology.md
- Short Questions in ENT: https://www.theentresident.com/ent-notes-lectures/category/short-questions-in-ent.md
- Mnemonics in ENT: https://www.theentresident.com/ent-notes-lectures/category/mnemonics-in-ent.md
- Differences Tables in ENT: https://www.theentresident.com/ent-notes-lectures/category/differences-tables-in-ent.md

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