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Coronoid Hyperplasia
Lisa J. Koenig, BChD, DDS, MS; David Hatcher, DDS, MSc; Dania Tamimi, BDS, DMSc
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Synonyms

                • Jacob disease: Coronoid process hyperplasia with pseudocartilaginous joint between coronoid process and zygoma
              • Definitions

                • Uncommon unilateral or bilateral elongation or enlargement of coronoid process

              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

                                            • Reporting Tips

                                              Selected References

                                              1. Lehman H et al: Limited mouth opening of unknown cause cured by diagnostic coronoidectomy: a new clinical entity? Br J Oral Maxillofac Surg. 53(3):230-4, 2015
                                              2. Torenek K et al: Clinical and radiological findings of a bilateral coronoid hyperplasia case. Eur J Dent. 9(1):149-52, 2015
                                              3. Kim SM et al: Mouth opening limitation caused by coronoid hyperplasia: a report of four cases. J Korean Assoc Oral Maxillofac Surg. 40(6):301-7, 2014
                                              4. Choi JG et al: Bilateral coronoid process hyperplasia with pseudocartilaginous joint formation: Jacob disease. J Oral Maxillofac Surg. 71(2):316-21, 2013
                                              5. Bayar GR et al: An excessive coronoid hyperplasia with suspected traumatic etiology resulting in mandibular hypomobility. Cranio. 30(2):144-9, 2012
                                              6. Costa YM et al: Coronoid process hyperplasia: an unusual cause of mandibular hypomobility. Braz Dent J. 23(3):252-5, 2012
                                              7. Mulder CH et al: Coronoid process hyperplasia: a systematic review of the literature from 1995. Int J Oral Maxillofac Surg. 41(12):1483-9, 2012
                                              8. Sleeman D et al: Unilateral coronoid hyperplasia associated with early childhood facial trauma: a case presentation. J Ir Dent Assoc. 58(4):212-4, 2012
                                              9. Sreeramaneni SK et al: Jacob's disease: report of a rare case and literature review. Int J Oral Maxillofac Surg. 40(7):753-7, 2011
                                              10. Galiè M et al: Early surgical treatment in unilateral coronoid hyperplasia and facial asymmetry. J Craniofac Surg. 21(1):129-33, 2010
                                              11. Zhong SC et al: Bilateral coronoid hyperplasia (Jacob disease on right and elongation on left): report of a case and literature review. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 107(3):e64-7, 2009
                                              12. Akan H et al: The value of three-dimensional computed tomography in diagnosis and management of Jacob's disease. Dentomaxillofac Radiol. 35(1):55-9, 2006
                                              13. Satoh K et al: Bilateral coronoid hyperplasia in an adolescent: report of a case and review of the literature. J Oral Maxillofac Surg. 64(2):334-8, 2006
                                              14. Izumi M et al: Computed tomographic features of bilateral coronoid process hyperplasia with special emphasis on patients without interference between the process and the zygomatic bone. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 99(1):93-100, 2005
                                              15. Fabié L et al: Neonatal bilateral idiopathic hyperplasia of the coronoid processes: case report. J Oral Maxillofac Surg. 60(4):459-62, 2002
                                              16. Pregarz M et al: Computed tomography and magnetic resonance imaging in the management of coronoid process hyperplasia: review of five cases. Dentomaxillofac Radiol. 27(4):215-20, 1998
                                              Related Anatomy
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                                              Related Differential Diagnoses
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                                              References
                                              Tables

                                              Tables

                                              KEY FACTS

                                              • Terminology

                                                • Imaging

                                                  • Top Differential Diagnoses

                                                    • Pathology

                                                      • Clinical Issues

                                                        • Diagnostic Checklist

                                                          TERMINOLOGY

                                                          • Synonyms

                                                            • Jacob disease: Coronoid process hyperplasia with pseudocartilaginous joint between coronoid process and zygoma
                                                          • Definitions

                                                            • Uncommon unilateral or bilateral elongation or enlargement of coronoid process

                                                          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

                                                                                        • Reporting Tips

                                                                                          Selected References

                                                                                          1. Lehman H et al: Limited mouth opening of unknown cause cured by diagnostic coronoidectomy: a new clinical entity? Br J Oral Maxillofac Surg. 53(3):230-4, 2015
                                                                                          2. Torenek K et al: Clinical and radiological findings of a bilateral coronoid hyperplasia case. Eur J Dent. 9(1):149-52, 2015
                                                                                          3. Kim SM et al: Mouth opening limitation caused by coronoid hyperplasia: a report of four cases. J Korean Assoc Oral Maxillofac Surg. 40(6):301-7, 2014
                                                                                          4. Choi JG et al: Bilateral coronoid process hyperplasia with pseudocartilaginous joint formation: Jacob disease. J Oral Maxillofac Surg. 71(2):316-21, 2013
                                                                                          5. Bayar GR et al: An excessive coronoid hyperplasia with suspected traumatic etiology resulting in mandibular hypomobility. Cranio. 30(2):144-9, 2012
                                                                                          6. Costa YM et al: Coronoid process hyperplasia: an unusual cause of mandibular hypomobility. Braz Dent J. 23(3):252-5, 2012
                                                                                          7. Mulder CH et al: Coronoid process hyperplasia: a systematic review of the literature from 1995. Int J Oral Maxillofac Surg. 41(12):1483-9, 2012
                                                                                          8. Sleeman D et al: Unilateral coronoid hyperplasia associated with early childhood facial trauma: a case presentation. J Ir Dent Assoc. 58(4):212-4, 2012
                                                                                          9. Sreeramaneni SK et al: Jacob's disease: report of a rare case and literature review. Int J Oral Maxillofac Surg. 40(7):753-7, 2011
                                                                                          10. Galiè M et al: Early surgical treatment in unilateral coronoid hyperplasia and facial asymmetry. J Craniofac Surg. 21(1):129-33, 2010
                                                                                          11. Zhong SC et al: Bilateral coronoid hyperplasia (Jacob disease on right and elongation on left): report of a case and literature review. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 107(3):e64-7, 2009
                                                                                          12. Akan H et al: The value of three-dimensional computed tomography in diagnosis and management of Jacob's disease. Dentomaxillofac Radiol. 35(1):55-9, 2006
                                                                                          13. Satoh K et al: Bilateral coronoid hyperplasia in an adolescent: report of a case and review of the literature. J Oral Maxillofac Surg. 64(2):334-8, 2006
                                                                                          14. Izumi M et al: Computed tomographic features of bilateral coronoid process hyperplasia with special emphasis on patients without interference between the process and the zygomatic bone. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 99(1):93-100, 2005
                                                                                          15. Fabié L et al: Neonatal bilateral idiopathic hyperplasia of the coronoid processes: case report. J Oral Maxillofac Surg. 60(4):459-62, 2002
                                                                                          16. Pregarz M et al: Computed tomography and magnetic resonance imaging in the management of coronoid process hyperplasia: review of five cases. Dentomaxillofac Radiol. 27(4):215-20, 1998