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Parotid Lipoma
Carmen C. Cho, MBBS, FRCR; H. Y. Yuen, MBChB, FRCR; Anil T. Ahuja, MD, FRCR
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KEY FACTS

  • Imaging

    • Top Differential Diagnoses

      • Diagnostic Checklist

        TERMINOLOGY

        • Synonyms

          • Classic parotid lipoma
          • Simple parotid lipoma
        • Definitions

          • Encapsulated benign tumor of adipose tissue composed of mature fat cells
        • Associated Syndromes

          • Familial multiple lipomatosis
          • Cowden syndrome
          • Multiple endocrine neoplasia type 1 (MEN1)
          • Dercum disease
          • Bannayan syndrome

        IMAGING

        • General Features

          • Ultrasonographic Findings

            • CT Findings

              • MR Findings

                • Imaging Recommendations

                  DIFFERENTIAL DIAGNOSIS

                    PATHOLOGY

                    • Staging, Grading, & Classification

                      • Gross Pathologic & Surgical Features

                        • Microscopic Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Arakeri SU et al: Sialolipoma of parotid gland in a 1-year-old male child: A case report and review of literature. J Oral Maxillofac Pathol. 22(Suppl 1):S57-S59, 2018
                                      2. Rehal SS et al: Post-traumatic lipoma of the parotid gland. J Surg Case Rep. 2016(4), 2016
                                      3. Ozturk M et al: Fibrolipoma of the nasal septum; report of the first case. J Otolaryngol Head Neck Surg. 42(1):11, 2013
                                      4. Qayyum S et al: Sialolipoma of the parotid gland: Case report with literature review comparing major and minor salivary gland sialolipomas. J Oral Maxillofac Pathol. 17(1):95-7, 2013
                                      5. Starkman SJ et al: Lipomatous lesions of the parotid gland: analysis of 70 cases. Laryngoscope. 123(3):651-6, 2013
                                      6. Bhatia KS et al: A pilot study evaluating real-time shear wave ultrasound elastography of miscellaneous non-nodal neck masses in a routine head and neck ultrasound clinic. Ultrasound Med Biol. 38(6):933-42, 2012
                                      7. Fakhry N et al: Is surgical excision of lipomas arising from the parotid gland systematically required? Eur Arch Otorhinolaryngol. 269(7):1839-44, 2012
                                      8. Sah K et al: Non-infiltrating angiolipoma of the upper lip: A rare entity. J Oral Maxillofac Pathol. 16(1):103-6, 2012
                                      9. Bhatia KS et al: Real-time qualitative ultrasound elastography of miscellaneous non-nodal neck masses: applications and limitations. Ultrasound Med Biol. 36(10):1644-52, 2010
                                      10. Hohlweg-Majert B et al: Salivary gland lipomas: ultrasonographic and magnetic resonance imaging. J Craniofac Surg. 18(6):1464-6, 2007
                                      11. Madani G et al: Tumors of the salivary glands. Semin Ultrasound CT MR. 27(6):452-64, 2006
                                      12. Furlong MA et al: Lipoma of the oral and maxillofacial region: Site and subclassification of 125 cases. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 98(4):441-50, 2004
                                      13. Inampudi P et al: Soft-tissue lipomas: accuracy of sonography in diagnosis with pathologic correlation. Radiology. 233(3):763-7, 2004
                                      14. Zhong LP et al: Ultrasonographic appearance of lipoma in the oral and maxillofacial region. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 98(6):738-40, 2004
                                      15. Gritzmann N et al: [Lipoma in the parotid gland: typical US and CT morphology.] Ultraschall Med. 24(3):195-6, 2003
                                      16. Ahuja AT et al: Head and neck lipomas: sonographic appearance. AJNR Am J Neuroradiol. 19(3):505-8, 1998
                                      17. Chikui T et al: Imaging findings of lipomas in the orofacial region with CT, US, and MRI. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 84(1):88-95, 1997
                                      18. Rougraff BT et al: Histologic correlation with magnetic resonance imaging for benign and malignant lipomatous masses. Sarcoma. 1(3-4):175-9, 1997
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Imaging

                                        • Top Differential Diagnoses

                                          • Diagnostic Checklist

                                            TERMINOLOGY

                                            • Synonyms

                                              • Classic parotid lipoma
                                              • Simple parotid lipoma
                                            • Definitions

                                              • Encapsulated benign tumor of adipose tissue composed of mature fat cells
                                            • Associated Syndromes

                                              • Familial multiple lipomatosis
                                              • Cowden syndrome
                                              • Multiple endocrine neoplasia type 1 (MEN1)
                                              • Dercum disease
                                              • Bannayan syndrome

                                            IMAGING

                                            • General Features

                                              • Ultrasonographic Findings

                                                • CT Findings

                                                  • MR Findings

                                                    • Imaging Recommendations

                                                      DIFFERENTIAL DIAGNOSIS

                                                        PATHOLOGY

                                                        • Staging, Grading, & Classification

                                                          • Gross Pathologic & Surgical Features

                                                            • Microscopic Features

                                                              CLINICAL ISSUES

                                                              • Presentation

                                                                • Demographics

                                                                  • Natural History & Prognosis

                                                                    • Treatment

                                                                      DIAGNOSTIC CHECKLIST

                                                                      • Consider

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Arakeri SU et al: Sialolipoma of parotid gland in a 1-year-old male child: A case report and review of literature. J Oral Maxillofac Pathol. 22(Suppl 1):S57-S59, 2018
                                                                          2. Rehal SS et al: Post-traumatic lipoma of the parotid gland. J Surg Case Rep. 2016(4), 2016
                                                                          3. Ozturk M et al: Fibrolipoma of the nasal septum; report of the first case. J Otolaryngol Head Neck Surg. 42(1):11, 2013
                                                                          4. Qayyum S et al: Sialolipoma of the parotid gland: Case report with literature review comparing major and minor salivary gland sialolipomas. J Oral Maxillofac Pathol. 17(1):95-7, 2013
                                                                          5. Starkman SJ et al: Lipomatous lesions of the parotid gland: analysis of 70 cases. Laryngoscope. 123(3):651-6, 2013
                                                                          6. Bhatia KS et al: A pilot study evaluating real-time shear wave ultrasound elastography of miscellaneous non-nodal neck masses in a routine head and neck ultrasound clinic. Ultrasound Med Biol. 38(6):933-42, 2012
                                                                          7. Fakhry N et al: Is surgical excision of lipomas arising from the parotid gland systematically required? Eur Arch Otorhinolaryngol. 269(7):1839-44, 2012
                                                                          8. Sah K et al: Non-infiltrating angiolipoma of the upper lip: A rare entity. J Oral Maxillofac Pathol. 16(1):103-6, 2012
                                                                          9. Bhatia KS et al: Real-time qualitative ultrasound elastography of miscellaneous non-nodal neck masses: applications and limitations. Ultrasound Med Biol. 36(10):1644-52, 2010
                                                                          10. Hohlweg-Majert B et al: Salivary gland lipomas: ultrasonographic and magnetic resonance imaging. J Craniofac Surg. 18(6):1464-6, 2007
                                                                          11. Madani G et al: Tumors of the salivary glands. Semin Ultrasound CT MR. 27(6):452-64, 2006
                                                                          12. Furlong MA et al: Lipoma of the oral and maxillofacial region: Site and subclassification of 125 cases. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 98(4):441-50, 2004
                                                                          13. Inampudi P et al: Soft-tissue lipomas: accuracy of sonography in diagnosis with pathologic correlation. Radiology. 233(3):763-7, 2004
                                                                          14. Zhong LP et al: Ultrasonographic appearance of lipoma in the oral and maxillofacial region. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 98(6):738-40, 2004
                                                                          15. Gritzmann N et al: [Lipoma in the parotid gland: typical US and CT morphology.] Ultraschall Med. 24(3):195-6, 2003
                                                                          16. Ahuja AT et al: Head and neck lipomas: sonographic appearance. AJNR Am J Neuroradiol. 19(3):505-8, 1998
                                                                          17. Chikui T et al: Imaging findings of lipomas in the orofacial region with CT, US, and MRI. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 84(1):88-95, 1997
                                                                          18. Rougraff BT et al: Histologic correlation with magnetic resonance imaging for benign and malignant lipomatous masses. Sarcoma. 1(3-4):175-9, 1997