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KEY FACTS
Imaging
Top Differential Diagnoses
Pathology
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Antrochoanal polyp (ACP)
Synonyms
- Killian polyp
Definitions
- ACP: Inflammatory polyp arising from maxillary sinus antrum, herniating through major or accessory ostium into nasal cavity ± prolapsing into nasopharynx
- Other solitary polyps named based on site of origin → site of termination
- ACP: Inflammatory polyp arising from maxillary sinus antrum, herniating through major or accessory ostium into nasal cavity ± prolapsing into nasopharynx
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
- Galluzzi F et al: Recurrences of surgery for antrochoanal polyps in children: a systematic review. Int J Pediatr Otorhinolaryngol. 106:26-30, 2018
- Bakshi SS et al: Antrochoanal polyp. J Allergy Clin Immunol Pract. 5(3):806-7, 2017
- Lee DH et al: Difference of antrochoanal polyp between children and adults. Int J Pediatr Otorhinolaryngol. 84:143-6, 2016
- Thompson LD et al: Update on select benign mesenchymal and meningothelial sinonasal tract lesions. Head Neck Pathol. 10(1):95-108, 2016
- Choudhury N et al: Endoscopic management of antrochoanal polyps: a single UK centre's experience. Eur Arch Otorhinolaryngol. 272(9):2305-11, 2015
- Kizil Y et al: Analysis of choanal polyps. J Craniofac Surg. 25(3):1082-4, 2014
- Kim YK et al: Nasal polyps with metaplastic ossification: CT and MR imaging findings. Neuroradiology. 52(12):1179-84, 2010
- Frosini P et al: Antrochoanal polyp: analysis of 200 cases. Acta Otorhinolaryngol Ital. 29(1):21-6, 2009
- Lee JY: Unilateral paranasal sinus diseases: analysis of the clinical characteristics, diagnosis, pathology, and computed tomography findings. Acta Otolaryngol. 128(6):621-6, 2008
- Topal O et al: Expression of metalloproteinases MMP-2 and MMP-9 in antrochoanal polyps. Am J Rhinol. 22(4):339-42, 2008
- Aydin O et al: Choanal polyps: an evaluation of 53 cases. Am J Rhinol. 21(2):164-8, 2007
- Yuca K et al: Evaluation and treatment of antrochoanal polyps. J Otolaryngol. 35(6):420-3, 2006
- Maldonado M et al: The antrochoanal polyp. Rhinology. 42(4):178-82, 2004
- Chung SK et al: Surgical, radiologic, and histologic findings of the antrochoanal polyp. Am J Rhinol. 16(2):71-6, 2002
- Larsen K et al: The estimated incidence of symptomatic nasal polyps. Acta Otolaryngol. 122(2): 179-82, 2002
- Ozdek A et al: Antrochoanal polyps in children. Int J Pediatr Otorhinolaryngol. 65(3): 213-8, 2002
- Basu SK et al: Bilateral antrochoanal polyps. J Laryngol Otol. 115(7): 561-2, 2001
- De Vuysere S et al: Sinochoanal polyp and its variant, the angiomatous polyp: MRI findings. Eur Radiol. 11(1): 55-8, 2001
- Orvidas LJ et al: Antrochoanal polyps in children. Am J Rhinol. 15(5):321-5, 2001
- Skladzien J et al: Morphological and clinical characteristics of antrochoanal polyps: comparison with chronic inflammation-associated polyps of the maxillary sinus. Auris Nasus Larynx. 28(2): 137-41, 2001
- Pruna X et al: Antrochoanal polyps in children: CT findings and differential diagnosis. Eur Radiol. 10(5):849-51, 2000
- Weissman JL et al: Sphenochoanal polyps: evaluation with CT and MR imaging. Radiology. 178(1):145-8, 1991
- Towbin R et al: Antrochoanal polyps. AJR Am J Roentgenol. 132(1):27-31, 1979
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References
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Tables
KEY FACTS
Imaging
Top Differential Diagnoses
Pathology
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Antrochoanal polyp (ACP)
Synonyms
- Killian polyp
Definitions
- ACP: Inflammatory polyp arising from maxillary sinus antrum, herniating through major or accessory ostium into nasal cavity ± prolapsing into nasopharynx
- Other solitary polyps named based on site of origin → site of termination
- ACP: Inflammatory polyp arising from maxillary sinus antrum, herniating through major or accessory ostium into nasal cavity ± prolapsing into nasopharynx
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
- Galluzzi F et al: Recurrences of surgery for antrochoanal polyps in children: a systematic review. Int J Pediatr Otorhinolaryngol. 106:26-30, 2018
- Bakshi SS et al: Antrochoanal polyp. J Allergy Clin Immunol Pract. 5(3):806-7, 2017
- Lee DH et al: Difference of antrochoanal polyp between children and adults. Int J Pediatr Otorhinolaryngol. 84:143-6, 2016
- Thompson LD et al: Update on select benign mesenchymal and meningothelial sinonasal tract lesions. Head Neck Pathol. 10(1):95-108, 2016
- Choudhury N et al: Endoscopic management of antrochoanal polyps: a single UK centre's experience. Eur Arch Otorhinolaryngol. 272(9):2305-11, 2015
- Kizil Y et al: Analysis of choanal polyps. J Craniofac Surg. 25(3):1082-4, 2014
- Kim YK et al: Nasal polyps with metaplastic ossification: CT and MR imaging findings. Neuroradiology. 52(12):1179-84, 2010
- Frosini P et al: Antrochoanal polyp: analysis of 200 cases. Acta Otorhinolaryngol Ital. 29(1):21-6, 2009
- Lee JY: Unilateral paranasal sinus diseases: analysis of the clinical characteristics, diagnosis, pathology, and computed tomography findings. Acta Otolaryngol. 128(6):621-6, 2008
- Topal O et al: Expression of metalloproteinases MMP-2 and MMP-9 in antrochoanal polyps. Am J Rhinol. 22(4):339-42, 2008
- Aydin O et al: Choanal polyps: an evaluation of 53 cases. Am J Rhinol. 21(2):164-8, 2007
- Yuca K et al: Evaluation and treatment of antrochoanal polyps. J Otolaryngol. 35(6):420-3, 2006
- Maldonado M et al: The antrochoanal polyp. Rhinology. 42(4):178-82, 2004
- Chung SK et al: Surgical, radiologic, and histologic findings of the antrochoanal polyp. Am J Rhinol. 16(2):71-6, 2002
- Larsen K et al: The estimated incidence of symptomatic nasal polyps. Acta Otolaryngol. 122(2): 179-82, 2002
- Ozdek A et al: Antrochoanal polyps in children. Int J Pediatr Otorhinolaryngol. 65(3): 213-8, 2002
- Basu SK et al: Bilateral antrochoanal polyps. J Laryngol Otol. 115(7): 561-2, 2001
- De Vuysere S et al: Sinochoanal polyp and its variant, the angiomatous polyp: MRI findings. Eur Radiol. 11(1): 55-8, 2001
- Orvidas LJ et al: Antrochoanal polyps in children. Am J Rhinol. 15(5):321-5, 2001
- Skladzien J et al: Morphological and clinical characteristics of antrochoanal polyps: comparison with chronic inflammation-associated polyps of the maxillary sinus. Auris Nasus Larynx. 28(2): 137-41, 2001
- Pruna X et al: Antrochoanal polyps in children: CT findings and differential diagnosis. Eur Radiol. 10(5):849-51, 2000
- Weissman JL et al: Sphenochoanal polyps: evaluation with CT and MR imaging. Radiology. 178(1):145-8, 1991
- Towbin R et al: Antrochoanal polyps. AJR Am J Roentgenol. 132(1):27-31, 1979
