EVALUATION OF ENDOSCOPIC, CT SCAN FEATURES AND ATTACHMENT SITE OF KILLIAN’S POLYP

Nguyễn Thị Hà 1 , , Trần Phan Chung Thuỷ 2
1 Thong Nhat Hospital image/svg+xml
2 Ho Chi Minh City Otorhinolaryngology Hospital image/svg+xml
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DOI
10.63947/bvtn.v2i8.10
Published
2026-06-07
Issue Vol. 2 No. 8 (2026): Geriatric Medicine in the Era of Personalization, Technology, and Prevention
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Original Research
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Research

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1.
Thị Hà N, Phan Chung Thuỷ T. EVALUATION OF ENDOSCOPIC, CT SCAN FEATURES AND ATTACHMENT SITE OF KILLIAN’S POLYP. JHA [Internet]. Vietnam; 2026 Jun. 7 [cited 2026 Jun. 18];2(8):69–77. https://tcsuckhoelaohoa.vn/bvtn/article/view/213 doi: 10.63947/bvtn.v2i8.10
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Abstract

Killian’s polyp (antrochoanal polyp) accounts for approximately 4% to 6% of all nasal polyps. However, the attachment site of Killian’s polyp is located within the maxillary sinus, making it difficult to visualize and access directly. According to a study by F. Galluzzi in 2018, the recurrence rate after surgery is 15%. Therefore, identifying the attachment site of Killian’s polyp is essential. Objective: To investigate the endoscopic and CT-scan characteristics, as well as the attachment site of Killian’s polyp. Materials and Methods: A case series study using both retrospective and prospective sampling methods. Results: The male-to-female ratio was 1.85:1. Most patients presented in the late stage, with 89.2% showing partial or complete obstruction of the choana. On CT scan, opacification of sinuses on the same side as the polyp was observed in the following order: maxillary sinus (100%), anterior ethmoid (67.6%), posterior ethmoid (41.5%), frontal sinus (24.3%), and sphenoid sinus (16.2%). An accessory maxillary sinus ostium was detected on the polyp side in 49% of cases and on the contralateral side in 16.2%, with a statistically significant association (p = 0.018 < 0.05). Among 37 patients with Killian’s polyp, 6 (16.2%) had contralateral maxillary sinus cysts. All six of these had small polyps within the maxillary sinus, and the attachment site was identifiable. In 16.2% of cases with partial opacification of the maxillary sinus on CT scan, the attachment site could be determined, whereas in 83.8% with complete opacification, the site could not be identified. Killian’s polyp most commonly originated from the medial wall (13 cases, 35.1%), followed by the posterior wall (9 cases, 24.3%), inferior wall (4 cases, 10.8%), and rarely from the anterior wall (3 cases, 8.1%). No cases originated from the superior wall of the maxillary sinus. During surgery, the accessory maxillary ostium was more clearly and accurately identified than on CT scans (59.5% vs. 49%). The presence of concha bullosa was not associated with Killian’s polyp (p > 0.05). Nasal septal deviation was observed in 20 of 37 cases (54%). There was no statistically significant correlation between the polyp’s side and the side of septal deviation (p = 0.501 > 0.05). Conclusion: Most patients presented at a late stage. Maxillary and ethmoid sinus opacification are the most common imaging findings in patients with Killian’s polyp. There is a statistically significant association between the presence of an accessory maxillary ostium and the side of the Killian’s polyp. The polyp attachment site is more clearly identified during surgery than on CT scans.

Keywords

Killian’s polyp attachment site maxillary sinus CT scan

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