Presentation
Right nasal obstruction.
Patient Data
Age: 17 years
Gender: Male
From the case:
Antrochoanal polyp
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Well-defined polyp arising from the right maxillary sinus and extending into the nasopharynx through an enlarged accessory maxillary ostium in keeping with an antrochoanal polyp.
Deviated nasal septum.
Case Discussion
CT features of an antrochoanal polyp.
Antrochoanal polys (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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