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Dermoid and Epidermoid
Eunice Y. L. Dai, 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

          • Developmental cyst, ectodermal inclusion cyst, dermoid cyst
        • Definitions

          • Cystic lesion resulting from congenital epithelial inclusion or rest
            • Dermoid: Epithelial elements plus dermal substructure, including dermal appendages
            • Epidermoid: Epithelial elements only

        IMAGING

        • General Features

          • Ultrasonographic Findings

            • CT Findings

              • MR Findings

                • Imaging Recommendations

                  DIFFERENTIAL DIAGNOSIS

                    PATHOLOGY

                    • General Features

                      • Staging, Grading, & Classification

                        • Gross Pathologic & Surgical Features

                          • Microscopic Features

                            CLINICAL ISSUES

                            • Presentation

                              • Demographics

                                • Natural History & Prognosis

                                  • Treatment

                                    DIAGNOSTIC CHECKLIST

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Bansal AG et al: US of pediatric superficial masses of the head and neck. Radiographics. 38(4):1239-1263, 2018
                                      2. Choi HI et al: Ultrasonographic features differentiating thyroglossal duct cysts from dermoid cysts. Ultrasonography. 37(1):71-77, 2018
                                      3. Paradis J et al: Pediatric teratoma and dermoid cysts. Otolaryngol Clin North Am. 48(1):121-36, 2015
                                      4. Harnsberger HR et al: Diagnostic Imaging: Head & Neck. 2nd ed. Salt Lake City: Amirsys, Inc. I-14,12-15, 2011
                                      5. Din SU: Dermoid cyst of the floor of mouth. J Coll Physicians Surg Pak. 13(7):416-7, 2003
                                      6. Longo F et al: Midline (dermoid) cysts of the floor of the mouth: report of 16 cases and review of surgical techniques. Plast Reconstr Surg. 112(6):1560-5, 2003
                                      7. Fuchshuber S et al: Dermoid cyst of the floor of the mouth--a case report. Eur Arch Otorhinolaryngol. 259(2):60-2, 2002
                                      8. Mathews J et al: True lateral dermoid cyst of the floor of the mouth. J Laryngol Otol. 115(4):333-5, 2001
                                      9. Ahuja AT et al: Practical Head & Neck Ultrasound. London: Greenwich Medical Media. 85-104, 2000
                                      10. Myssiorek D et al: Intralingual dermoid cysts: a report of two new cases. Ear Nose Throat J. 79(5):380-3, 2000
                                      11. Godden DR et al: Sliding dermoid cyst. A case report. Int J Oral Maxillofac Surg. 28(6):459-60, 1999
                                      12. Yousem DM et al: Oral cavity and pharynx. Radiol Clin North Am. 36(5):967-81, vii, 1998
                                      13. Miles LP et al: Congenital dermoid cyst of the tongue. J Laryngol Otol. 111(12):1179-82, 1997
                                      14. Tuffin JR et al: True lateral dermoid cyst of the neck. Int J Oral Maxillofac Surg. 20(5):275-6, 1991
                                      15. al-Khayat M et al: Midline sublingual dermoid cyst. J Laryngol Otol. 104(7):578-80, 1990
                                      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

                                              • Developmental cyst, ectodermal inclusion cyst, dermoid cyst
                                            • Definitions

                                              • Cystic lesion resulting from congenital epithelial inclusion or rest
                                                • Dermoid: Epithelial elements plus dermal substructure, including dermal appendages
                                                • Epidermoid: Epithelial elements only

                                            IMAGING

                                            • General Features

                                              • Ultrasonographic Findings

                                                • CT Findings

                                                  • MR Findings

                                                    • Imaging Recommendations

                                                      DIFFERENTIAL DIAGNOSIS

                                                        PATHOLOGY

                                                        • General Features

                                                          • Staging, Grading, & Classification

                                                            • Gross Pathologic & Surgical Features

                                                              • Microscopic Features

                                                                CLINICAL ISSUES

                                                                • Presentation

                                                                  • Demographics

                                                                    • Natural History & Prognosis

                                                                      • Treatment

                                                                        DIAGNOSTIC CHECKLIST

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Bansal AG et al: US of pediatric superficial masses of the head and neck. Radiographics. 38(4):1239-1263, 2018
                                                                          2. Choi HI et al: Ultrasonographic features differentiating thyroglossal duct cysts from dermoid cysts. Ultrasonography. 37(1):71-77, 2018
                                                                          3. Paradis J et al: Pediatric teratoma and dermoid cysts. Otolaryngol Clin North Am. 48(1):121-36, 2015
                                                                          4. Harnsberger HR et al: Diagnostic Imaging: Head & Neck. 2nd ed. Salt Lake City: Amirsys, Inc. I-14,12-15, 2011
                                                                          5. Din SU: Dermoid cyst of the floor of mouth. J Coll Physicians Surg Pak. 13(7):416-7, 2003
                                                                          6. Longo F et al: Midline (dermoid) cysts of the floor of the mouth: report of 16 cases and review of surgical techniques. Plast Reconstr Surg. 112(6):1560-5, 2003
                                                                          7. Fuchshuber S et al: Dermoid cyst of the floor of the mouth--a case report. Eur Arch Otorhinolaryngol. 259(2):60-2, 2002
                                                                          8. Mathews J et al: True lateral dermoid cyst of the floor of the mouth. J Laryngol Otol. 115(4):333-5, 2001
                                                                          9. Ahuja AT et al: Practical Head & Neck Ultrasound. London: Greenwich Medical Media. 85-104, 2000
                                                                          10. Myssiorek D et al: Intralingual dermoid cysts: a report of two new cases. Ear Nose Throat J. 79(5):380-3, 2000
                                                                          11. Godden DR et al: Sliding dermoid cyst. A case report. Int J Oral Maxillofac Surg. 28(6):459-60, 1999
                                                                          12. Yousem DM et al: Oral cavity and pharynx. Radiol Clin North Am. 36(5):967-81, vii, 1998
                                                                          13. Miles LP et al: Congenital dermoid cyst of the tongue. J Laryngol Otol. 111(12):1179-82, 1997
                                                                          14. Tuffin JR et al: True lateral dermoid cyst of the neck. Int J Oral Maxillofac Surg. 20(5):275-6, 1991
                                                                          15. al-Khayat M et al: Midline sublingual dermoid cyst. J Laryngol Otol. 104(7):578-80, 1990