Presentation
Right nasal obstruction.
Patient Data
Age: 35 years
Gender: Female
From the case:
Antrochoanal polyp
![](https://prod-images-static.radiopaedia.org/images/60372204/a193520bc57e18eea1359a013297fff5b0deb9eac6012da0f5758e4ce83bc4f2_thumb.jpeg)
![This study is a stack](/packs/stack-YQKLCKBI.gif)
![](https://prod-images-static.radiopaedia.org/images/60372314/8e984d999f25c5fce9260febb4d3cc1ad01d54d0b0d0c5605445947f340aa7f9_thumb.jpeg)
![This study is a stack](/packs/stack-YQKLCKBI.gif)
![](https://prod-images-static.radiopaedia.org/images/60372514/af6298b613fa9673616d911343bdfc19c77db0abc1e5c44b6a2399f06b01c6b6_thumb.jpeg)
![This study is a stack](/packs/stack-YQKLCKBI.gif)
Download
Info
![](https://prod-images-static.radiopaedia.org/images/60372204/a193520bc57e18eea1359a013297fff5b0deb9eac6012da0f5758e4ce83bc4f2_big_gallery.jpeg)
Well-defined mass arising from the right maxillary sinus and extending into the nasopharynx through an enlarged maxillary ostium.
Case Discussion
CT appearance of an antrochoanal polyp (ACP).