Presentation
Right nasal obstruction.
Patient Data
Age: 20 years
Gender: Female
From the case:
Antrochoanal polyp
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Well-defined polypoid mass of the right maxillary sinus, extending into the nasopharynx through an enlarged maxillary ostium in keeping with an antrochoanal polyp. No associated bony lesion is seen.
Case Discussion
CT features of an antrochoanal polyp.
Antrochoanal polyp (ACP) is a solitary sinonasal polyp that arises within the antrum of the maxillary sinus and passes through and enlarges the sinus ostium and posterior nasal cavity at the level of the choana.
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