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Epidural Hematoma, Variant
Anne G. Osborn, MD, FACR
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KEY FACTS

  • Terminology

    • Imaging

      TERMINOLOGY

      • Definitions

        • "Classic" (typical) epidural hematoma (EDH)
          • Arterial laceration
          • 90-95% supratentorial (temporoparietal most common)
          • Lateral temporoparietal location
          • Biconvex, unilateral
        • Variant EDH
          • Venous, not arterial
          • Atypical location
            • Posterior fossa EDH
            • Anterior middle cranial fossa EDH
            • Vertex EDH
            • Clival EDH
          • Unusual shape or density
            • Venous EDH may decompress into dural sinus
            • Initially hyperdense but may become mostly hypodense

      IMAGING

      • Venous EDH

        • Anterior Temporal EDH

          • Vertex EDH

            • Clival EDH

              DIFFERENTIAL DIAGNOSIS

                Selected References

                1. Klepinowski T et al: Acute-on-chronic vertex epidural hematoma with diastasis of the sagittal suture in an adult: a case report. World Neurosurg. 139:245-9, 2020
                2. Parker SL et al: Management of venous sinus-related epidural hematomas. World Neurosurg. 138:e241-50, 2020
                3. Sakamoto D et al: Two pediatric cases of epidural hematoma in the posterior fossa with extension along the sigmoid sinus groove: MR evaluation. Acta Radiol Open. 9(2):2058460120902894, 2020
                4. Fernandes-Cabral DT et al: Surgical management of vertex epidural hematoma: technical case report and literature review. World Neurosurg. 103:475-83, 2017
                5. Cikla U et al: Vertex epidural hematoma and triplegia. Neurol India. 62(4):437-8, 2014
                6. Gean AD et al: Benign anterior temporal epidural hematoma: indolent lesion with a characteristic CT imaging appearance after blunt head trauma. Radiology. 257(1):212-8, 2010
                Related Anatomy
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                Related Differential Diagnoses
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                References
                Tables

                Tables

                KEY FACTS

                • Terminology

                  • Imaging

                    TERMINOLOGY

                    • Definitions

                      • "Classic" (typical) epidural hematoma (EDH)
                        • Arterial laceration
                        • 90-95% supratentorial (temporoparietal most common)
                        • Lateral temporoparietal location
                        • Biconvex, unilateral
                      • Variant EDH
                        • Venous, not arterial
                        • Atypical location
                          • Posterior fossa EDH
                          • Anterior middle cranial fossa EDH
                          • Vertex EDH
                          • Clival EDH
                        • Unusual shape or density
                          • Venous EDH may decompress into dural sinus
                          • Initially hyperdense but may become mostly hypodense

                    IMAGING

                    • Venous EDH

                      • Anterior Temporal EDH

                        • Vertex EDH

                          • Clival EDH

                            DIFFERENTIAL DIAGNOSIS

                              Selected References

                              1. Klepinowski T et al: Acute-on-chronic vertex epidural hematoma with diastasis of the sagittal suture in an adult: a case report. World Neurosurg. 139:245-9, 2020
                              2. Parker SL et al: Management of venous sinus-related epidural hematomas. World Neurosurg. 138:e241-50, 2020
                              3. Sakamoto D et al: Two pediatric cases of epidural hematoma in the posterior fossa with extension along the sigmoid sinus groove: MR evaluation. Acta Radiol Open. 9(2):2058460120902894, 2020
                              4. Fernandes-Cabral DT et al: Surgical management of vertex epidural hematoma: technical case report and literature review. World Neurosurg. 103:475-83, 2017
                              5. Cikla U et al: Vertex epidural hematoma and triplegia. Neurol India. 62(4):437-8, 2014
                              6. Gean AD et al: Benign anterior temporal epidural hematoma: indolent lesion with a characteristic CT imaging appearance after blunt head trauma. Radiology. 257(1):212-8, 2010