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Axial bone window
CT through the paranasal sinuses demonstrates a low density mass filling the maxillary sinus protruding though an enlarged maxillary ostium.
Antrochoanal polyp
Presentation
Inspiratory difficulty, sleep apnoea
Patient Data
Age: 20
Case Discussion
The findings are compatible with antrochoanal polyp.
The antrochoanal polyp, a benign solitary polypoid lesion, usually arises in a maxillary sinus, opacifying and enlarging the sinus cavity, without bone destruction. It passes through the ostium of the sinus into the choana, and from there into the posterior nasopharynx. The soft tissue mass does not erode or destroy contiguous soft tissue or bony structures.
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