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Dermoid and Epidermoid
Bernadette L. Koch, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Diagnostic Checklist

        TERMINOLOGY

        • Synonyms

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

          • Congenital epithelial inclusion or rest → cystic mass
            • Epidermoid: Epithelial elements only
            • Dermoid: Epithelial elements + dermal substructure, including dermal appendages

        IMAGING

        • General Features

          • CT Findings

            • MR Findings

              • Ultrasonographic 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. Moses MA et al: The management of midline frontonasal dermoids: a review of 55 cases at a tertiary referral center and a protocol for treatment. Plast Reconstr Surg. 135(1):187-96, 2015
                                      2. Paradis J et al: Pediatric teratoma and dermoid cysts. Otolaryngol Clin North Am. 48(1):121-36, 2015
                                      3. Papadogeorgakis N et al: Surgical management of a large median dermoid cyst of the neck causing airway obstruction. A case report. Oral Maxillofac Surg. 13(3):181-4, 2009
                                      4. Lee SS et al: Refinement in technique for pediatric dermoid cyst excision: technical note. Plast Reconstr Surg. 122(4):1059-61, 2008
                                      5. Sari A et al: Atypical presentation of an intraorbital dermoid cyst. J Craniofac Surg. 19(6):1715-6, 2008
                                      6. Suzuki C et al: Apparent diffusion coefficient of subcutaneous epidermal cysts in the head and neck comparison with intracranial epidermoid cysts. Acad Radiol. 14(9):1020-8, 2007
                                      7. Hedlund G: Congenital frontonasal masses: developmental anatomy, malformations, and MR imaging. Pediatr Radiol. 36(7):647-62; quiz 726-7, 2006
                                      8. Khanna G, Sato Y, Smith RJ, Bauman NM, Nerad J. Causes of facial swelling in pediatric patients: correlation of clinical and radiologic findings. Radiographics. Jan-Feb;26(1):157-71, 2006
                                      9. Kim IK et al: Coexisting sublingual and submental dermoid cysts in an infant. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 102(6):778-81, 2006
                                      10. Yilmaz I et al: Giant sublingual epidermoid cyst: a report of two cases. J Laryngol Otol. 120(3):E19, 2006
                                      11. Bodner L et al: Dermoid cyst of the maxilla. Int J Oral Maxillofac Surg. 34(4):453-5, 2005
                                      12. Charrier JB et al: Craniofacial dermoids: an embryological theory unifying nasal dermoid sinus cysts. Cleft Palate Craniofac J. 42(1):51-7, 2005
                                      13. 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
                                      14. Rahbar R et al: The presentation and management of nasal dermoid: a 30-year experience. Arch Otolaryngol Head Neck Surg. 129(4):464-71, 2003
                                      15. Mathews J et al: True lateral dermoid cyst of the floor of the mouth. J Laryngol Otol. 115(4):333-5, 2001
                                      16. Myssiorek D et al: Intralingual dermoid cysts: a report of two new cases. Ear Nose Throat J. 79(5):380-3, 2000
                                      17. Yousem DM et al: Oral cavity and pharynx. Radiol Clin North Am. 36(5):967-81, vii, 1998
                                      18. 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

                                      • Terminology

                                        • Imaging

                                          • Diagnostic Checklist

                                            TERMINOLOGY

                                            • Synonyms

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

                                              • Congenital epithelial inclusion or rest → cystic mass
                                                • Epidermoid: Epithelial elements only
                                                • Dermoid: Epithelial elements + dermal substructure, including dermal appendages

                                            IMAGING

                                            • General Features

                                              • CT Findings

                                                • MR Findings

                                                  • Ultrasonographic 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. Moses MA et al: The management of midline frontonasal dermoids: a review of 55 cases at a tertiary referral center and a protocol for treatment. Plast Reconstr Surg. 135(1):187-96, 2015
                                                                          2. Paradis J et al: Pediatric teratoma and dermoid cysts. Otolaryngol Clin North Am. 48(1):121-36, 2015
                                                                          3. Papadogeorgakis N et al: Surgical management of a large median dermoid cyst of the neck causing airway obstruction. A case report. Oral Maxillofac Surg. 13(3):181-4, 2009
                                                                          4. Lee SS et al: Refinement in technique for pediatric dermoid cyst excision: technical note. Plast Reconstr Surg. 122(4):1059-61, 2008
                                                                          5. Sari A et al: Atypical presentation of an intraorbital dermoid cyst. J Craniofac Surg. 19(6):1715-6, 2008
                                                                          6. Suzuki C et al: Apparent diffusion coefficient of subcutaneous epidermal cysts in the head and neck comparison with intracranial epidermoid cysts. Acad Radiol. 14(9):1020-8, 2007
                                                                          7. Hedlund G: Congenital frontonasal masses: developmental anatomy, malformations, and MR imaging. Pediatr Radiol. 36(7):647-62; quiz 726-7, 2006
                                                                          8. Khanna G, Sato Y, Smith RJ, Bauman NM, Nerad J. Causes of facial swelling in pediatric patients: correlation of clinical and radiologic findings. Radiographics. Jan-Feb;26(1):157-71, 2006
                                                                          9. Kim IK et al: Coexisting sublingual and submental dermoid cysts in an infant. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 102(6):778-81, 2006
                                                                          10. Yilmaz I et al: Giant sublingual epidermoid cyst: a report of two cases. J Laryngol Otol. 120(3):E19, 2006
                                                                          11. Bodner L et al: Dermoid cyst of the maxilla. Int J Oral Maxillofac Surg. 34(4):453-5, 2005
                                                                          12. Charrier JB et al: Craniofacial dermoids: an embryological theory unifying nasal dermoid sinus cysts. Cleft Palate Craniofac J. 42(1):51-7, 2005
                                                                          13. 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
                                                                          14. Rahbar R et al: The presentation and management of nasal dermoid: a 30-year experience. Arch Otolaryngol Head Neck Surg. 129(4):464-71, 2003
                                                                          15. Mathews J et al: True lateral dermoid cyst of the floor of the mouth. J Laryngol Otol. 115(4):333-5, 2001
                                                                          16. Myssiorek D et al: Intralingual dermoid cysts: a report of two new cases. Ear Nose Throat J. 79(5):380-3, 2000
                                                                          17. Yousem DM et al: Oral cavity and pharynx. Radiol Clin North Am. 36(5):967-81, vii, 1998
                                                                          18. al-Khayat M et al: Midline sublingual dermoid cyst. J Laryngol Otol. 104(7):578-80, 1990