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Solitary Sinonasal Polyp
Philip R. Chapman, MD
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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 upon site of origin → site of termination

            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

                                          1. Lee DH et al: Difference of antrochoanal polyp between children and adults. Int J Pediatr Otorhinolaryngol. 84:143-6, 2016
                                          2. Thompson LD et al: Update on select benign mesenchymal and meningothelial sinonasal tract lesions. Head Neck Pathol. 10(1):95-108, 2016
                                          3. Choudhury N et al: Endoscopic management of antrochoanal polyps: a single UK centre's experience. Eur Arch Otorhinolaryngol. 272(9):2305-11, 2015
                                          4. Kizil Y et al: Choanal polyps: 98 Cases. J Craniofac Surg. 2014
                                          5. Kim YK et al: Nasal polyps with metaplastic ossification: CT and MR imaging findings. Neuroradiology. 52(12):1179-84, 2010
                                          6. Frosini P et al: Antrochoanal polyp: analysis of 200 cases. Acta Otorhinolaryngol Ital. 29(1):21-6, 2009
                                          7. Lee JY: Unilateral paranasal sinus diseases: analysis of the clinical characteristics, diagnosis, pathology, and computed tomography findings. Acta Otolaryngol. 128(6):621-6, 2008
                                          8. Topal O et al: Expression of metalloproteinases MMP-2 and MMP-9 in antrochoanal polyps. Am J Rhinol. 22(4):339-42, 2008
                                          9. Aydin O et al: Choanal polyps: an evaluation of 53 cases. Am J Rhinol. 21(2):164-8, 2007
                                          10. Yuca K et al: Evaluation and treatment of antrochoanal polyps. J Otolaryngol. 35(6):420-3, 2006
                                          11. Maldonado M et al: The antrochoanal polyp. Rhinology. 42(4):178-82, 2004
                                          12. Chung SK et al: Surgical, radiologic, and histologic findings of the antrochoanal polyp. Am J Rhinol. 16(2):71-6, 2002
                                          13. Larsen K et al: The estimated incidence of symptomatic nasal polyps. Acta Otolaryngol. 122(2): 179-82, 2002
                                          14. Ozdek A et al: Antrochoanal polyps in children. Int J Pediatr Otorhinolaryngol. 65(3): 213-8, 2002
                                          15. Basu SK et al: Bilateral antrochoanal polyps. J Laryngol Otol. 115(7): 561-2, 2001
                                          16. De Vuysere S et al: Sinochoanal polyp and its variant, the angiomatous polyp: MRI findings. Eur Radiol. 11(1): 55-8, 2001
                                          17. Orvidas LJ et al: Antrochoanal polyps in children. Am J Rhinol. 15(5):321-5, 2001
                                          18. 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
                                          19. Pruna X et al: Antrochoanal polyps in children: CT findings and differential diagnosis. Eur Radiol. 10(5):849-51, 2000
                                          20. Weissman JL et al: Sphenochoanal polyps: evaluation with CT and MR imaging. Radiology. 178(1):145-8, 1991
                                          21. Towbin R et al: Antrochoanal polyps. AJR Am J Roentgenol. 132(1):27-31, 1979
                                          Related Anatomy
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                                          Related Differential Diagnoses
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                                          References
                                          Tables

                                          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 upon site of origin → site of termination

                                                    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

                                                                                  1. Lee DH et al: Difference of antrochoanal polyp between children and adults. Int J Pediatr Otorhinolaryngol. 84:143-6, 2016
                                                                                  2. Thompson LD et al: Update on select benign mesenchymal and meningothelial sinonasal tract lesions. Head Neck Pathol. 10(1):95-108, 2016
                                                                                  3. Choudhury N et al: Endoscopic management of antrochoanal polyps: a single UK centre's experience. Eur Arch Otorhinolaryngol. 272(9):2305-11, 2015
                                                                                  4. Kizil Y et al: Choanal polyps: 98 Cases. J Craniofac Surg. 2014
                                                                                  5. Kim YK et al: Nasal polyps with metaplastic ossification: CT and MR imaging findings. Neuroradiology. 52(12):1179-84, 2010
                                                                                  6. Frosini P et al: Antrochoanal polyp: analysis of 200 cases. Acta Otorhinolaryngol Ital. 29(1):21-6, 2009
                                                                                  7. Lee JY: Unilateral paranasal sinus diseases: analysis of the clinical characteristics, diagnosis, pathology, and computed tomography findings. Acta Otolaryngol. 128(6):621-6, 2008
                                                                                  8. Topal O et al: Expression of metalloproteinases MMP-2 and MMP-9 in antrochoanal polyps. Am J Rhinol. 22(4):339-42, 2008
                                                                                  9. Aydin O et al: Choanal polyps: an evaluation of 53 cases. Am J Rhinol. 21(2):164-8, 2007
                                                                                  10. Yuca K et al: Evaluation and treatment of antrochoanal polyps. J Otolaryngol. 35(6):420-3, 2006
                                                                                  11. Maldonado M et al: The antrochoanal polyp. Rhinology. 42(4):178-82, 2004
                                                                                  12. Chung SK et al: Surgical, radiologic, and histologic findings of the antrochoanal polyp. Am J Rhinol. 16(2):71-6, 2002
                                                                                  13. Larsen K et al: The estimated incidence of symptomatic nasal polyps. Acta Otolaryngol. 122(2): 179-82, 2002
                                                                                  14. Ozdek A et al: Antrochoanal polyps in children. Int J Pediatr Otorhinolaryngol. 65(3): 213-8, 2002
                                                                                  15. Basu SK et al: Bilateral antrochoanal polyps. J Laryngol Otol. 115(7): 561-2, 2001
                                                                                  16. De Vuysere S et al: Sinochoanal polyp and its variant, the angiomatous polyp: MRI findings. Eur Radiol. 11(1): 55-8, 2001
                                                                                  17. Orvidas LJ et al: Antrochoanal polyps in children. Am J Rhinol. 15(5):321-5, 2001
                                                                                  18. 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
                                                                                  19. Pruna X et al: Antrochoanal polyps in children: CT findings and differential diagnosis. Eur Radiol. 10(5):849-51, 2000
                                                                                  20. Weissman JL et al: Sphenochoanal polyps: evaluation with CT and MR imaging. Radiology. 178(1):145-8, 1991
                                                                                  21. Towbin R et al: Antrochoanal polyps. AJR Am J Roentgenol. 132(1):27-31, 1979