Antrochoanal polyp: analysis of 200 cases

Area of Science:

• Otolaryngology
• Pathology
• Surgical Oncology

Background:

• Antrochoanal polyps (AAPs) are distinct nasal polyps, comprising 4-6% of all cases.
• They originate in the maxillary sinus and extend into the choana and nasopharynx.
• Recurrence after incomplete excision is common, prompting debate on their classification.

Purpose of the Study:

• To analyze clinical-aetiological data of a large series of patients with antrochoanal polyps.
• To investigate the nature of antrochoanal polyps and factors contributing to recurrence.
• To explore the potential link between antrochoanal polyps, maxillary sinus pressure, and pre-existing antral cysts.

Main Methods:

• Retrospective analysis of clinical and aetiological data from 200 patients treated for antrochoanal polyps.
• Review of the largest available series of antrochoanal polyps in the literature.
• Comparison of findings with existing studies on nasal polyposis.

Main Results:

• The study analyzed 200 consecutive cases treated between 1988 and 2006.
• Data revealed both similarities and discrepancies when compared to other reported series.
• Findings suggest a potential mechanism involving increased maxillary sinus pressure and herniation through the accessory ostium.

Conclusions:

• Antrochoanal polyps may arise from increased maxillary sinus pressure due to inflammatory-anatomical changes at the ostiomeatal complex.
• A pre-existing silent antral cyst might play a role in the herniation of the polyp.
• The findings support a specific pathophysiology for antrochoanal polyps, distinct from other nasal polyps.