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Benign Masticator Muscle Hypertrophy
Bronwyn E. Hamilton, MD
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KEY FACTS

  • Imaging

    • Top Differential Diagnoses

      • Pathology

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Abbreviations

              • Benign masticator muscle hypertrophy (BMMH)
            • Synonyms

              • Benign masseteric hypertrophy
            • Definitions

              • Benign enlargement of muscles of mastication (temporalis, masseter, medial, and lateral pterygoids)

            IMAGING

            • General Features

              • Radiographic Findings

                • CT Findings

                  • MR Findings

                    • Ultrasonographic Findings

                      • Nuclear Medicine Findings

                        • Other Modality Findings

                          • Imaging Recommendations

                            DIFFERENTIAL DIAGNOSIS

                              PATHOLOGY

                              • General Features

                                • Gross Pathologic & Surgical Features

                                  • Microscopic Features

                                    CLINICAL ISSUES

                                    • Presentation

                                      • Demographics

                                        • Natural History & Prognosis

                                          • Treatment

                                            DIAGNOSTIC CHECKLIST

                                            • Image Interpretation Pearls

                                              Selected References

                                              1. Naphade VV et al: Ultrasonographic diagnosis of benign masseter muscle hypertrophy: a case report. J Cancer Res Ther. 14(Supplement):S1237-40, 2018
                                              2. Peng HP et al: Complications of botulinum toxin injection for masseter hypertrophy: incidence rate from 2036 treatments and summary of causes and preventions. J Cosmet Dermatol. 17(1):33-8, 2018
                                              3. Harsha KJ et al: 'Effaced bilateral retromaxillary fat pad sign' in bilateral masseter and temporalis muscle hypertrophy. Neurol India. 65(2):410-11, 2017
                                              4. Prabhu R et al: Simultaneous bilateral hypertrophies of the parotid gland and masseter muscle: case report. J Oral Maxillofac Surg. 75(1):149-52, 2017
                                              5. No YA et al: Three-dimensional CT might be a potential evaluation modality in correction of asymmetrical masseter muscle hypertrophy by botulinum toxin injection. J Cosmet Laser Ther. 18(2):113-5, 2016
                                              6. Quezada-Gaon N et al: Comparison of clinical marking and ultrasound-guided injection of Botulinum type A toxin into the masseter muscles for treating bruxism and its cosmetic effects. J Cosmet Dermatol. 15(3):238-44, 2016
                                              7. Andreadis D et al: Bilateral masseter and internal pterygoid muscle hypertrophy: a diagnostic challenge. Med Princ Pract. 23(3):286-8, 2014
                                              8. Albuquerque CE et al: Conservative treatment of bilateral temporalis muscle hypertrophy in a pregnant woman. J Craniofac Surg. 23(1):e20-2, 2012
                                              9. Reddy R et al: Obstructive parotitis secondary to an acute masseteric bend. ORL J Otorhinolaryngol Relat Spec. 74(1):12-5, 2012
                                              10. Guruprasad R et al: Masseter and medial pterygoid muscle hypertrophy. BMJ Case Rep. 2011, 2011
                                              11. Ihn YK et al: FDG uptake in benign asymmetric hypertrophy of the masticator muscles. Clin Nucl Med. 31(4):221-2, 2006
                                              12. Connor SE et al: Masticator space masses and pseudomasses. Clin Radiol. 59(3):237-45, 2004
                                              13. Palacios E et al: Benign asymmetric hypertrophy of the masticator muscles. Ear Nose Throat J. 79(12):915, 2000
                                              14. Fyfe EC et al: Magnetic resonance imaging in the diagnosis of asymmetrical bilateral masseteric hypertrophy. Dentomaxillofac Radiol. 28(1):52-4, 1999
                                              15. Set PA et al: Pictorial review: benign and malignant enlargement of the pterygo-masseteric muscle complex. Clin Radiol. 48(1):57-60, 1993
                                              16. Braun IF et al: Computed tomography of benign masseteric hypertrophy. J Comput Assist Tomogr. 9(1):167-70, 1985
                                              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

                                                          • Benign masticator muscle hypertrophy (BMMH)
                                                        • Synonyms

                                                          • Benign masseteric hypertrophy
                                                        • Definitions

                                                          • Benign enlargement of muscles of mastication (temporalis, masseter, medial, and lateral pterygoids)

                                                        IMAGING

                                                        • General Features

                                                          • Radiographic Findings

                                                            • CT Findings

                                                              • MR Findings

                                                                • Ultrasonographic Findings

                                                                  • Nuclear Medicine Findings

                                                                    • Other Modality Findings

                                                                      • Imaging Recommendations

                                                                        DIFFERENTIAL DIAGNOSIS

                                                                          PATHOLOGY

                                                                          • General Features

                                                                            • Gross Pathologic & Surgical Features

                                                                              • Microscopic Features

                                                                                CLINICAL ISSUES

                                                                                • Presentation

                                                                                  • Demographics

                                                                                    • Natural History & Prognosis

                                                                                      • Treatment

                                                                                        DIAGNOSTIC CHECKLIST

                                                                                        • Image Interpretation Pearls

                                                                                          Selected References

                                                                                          1. Naphade VV et al: Ultrasonographic diagnosis of benign masseter muscle hypertrophy: a case report. J Cancer Res Ther. 14(Supplement):S1237-40, 2018
                                                                                          2. Peng HP et al: Complications of botulinum toxin injection for masseter hypertrophy: incidence rate from 2036 treatments and summary of causes and preventions. J Cosmet Dermatol. 17(1):33-8, 2018
                                                                                          3. Harsha KJ et al: 'Effaced bilateral retromaxillary fat pad sign' in bilateral masseter and temporalis muscle hypertrophy. Neurol India. 65(2):410-11, 2017
                                                                                          4. Prabhu R et al: Simultaneous bilateral hypertrophies of the parotid gland and masseter muscle: case report. J Oral Maxillofac Surg. 75(1):149-52, 2017
                                                                                          5. No YA et al: Three-dimensional CT might be a potential evaluation modality in correction of asymmetrical masseter muscle hypertrophy by botulinum toxin injection. J Cosmet Laser Ther. 18(2):113-5, 2016
                                                                                          6. Quezada-Gaon N et al: Comparison of clinical marking and ultrasound-guided injection of Botulinum type A toxin into the masseter muscles for treating bruxism and its cosmetic effects. J Cosmet Dermatol. 15(3):238-44, 2016
                                                                                          7. Andreadis D et al: Bilateral masseter and internal pterygoid muscle hypertrophy: a diagnostic challenge. Med Princ Pract. 23(3):286-8, 2014
                                                                                          8. Albuquerque CE et al: Conservative treatment of bilateral temporalis muscle hypertrophy in a pregnant woman. J Craniofac Surg. 23(1):e20-2, 2012
                                                                                          9. Reddy R et al: Obstructive parotitis secondary to an acute masseteric bend. ORL J Otorhinolaryngol Relat Spec. 74(1):12-5, 2012
                                                                                          10. Guruprasad R et al: Masseter and medial pterygoid muscle hypertrophy. BMJ Case Rep. 2011, 2011
                                                                                          11. Ihn YK et al: FDG uptake in benign asymmetric hypertrophy of the masticator muscles. Clin Nucl Med. 31(4):221-2, 2006
                                                                                          12. Connor SE et al: Masticator space masses and pseudomasses. Clin Radiol. 59(3):237-45, 2004
                                                                                          13. Palacios E et al: Benign asymmetric hypertrophy of the masticator muscles. Ear Nose Throat J. 79(12):915, 2000
                                                                                          14. Fyfe EC et al: Magnetic resonance imaging in the diagnosis of asymmetrical bilateral masseteric hypertrophy. Dentomaxillofac Radiol. 28(1):52-4, 1999
                                                                                          15. Set PA et al: Pictorial review: benign and malignant enlargement of the pterygo-masseteric muscle complex. Clin Radiol. 48(1):57-60, 1993
                                                                                          16. Braun IF et al: Computed tomography of benign masseteric hypertrophy. J Comput Assist Tomogr. 9(1):167-70, 1985