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Complex Chiari
Jeffrey S. Ross, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • Complex Chiari malformation (CCM), Chiari 1.5
              • Definitions

                • Caudal cerebellar tonsil and brainstem herniation with dorsal cervicomedullary "bump"
                • Frequently associated craniovertebral junction (CVJ) anomalies

              IMAGING

              • General Features

                • CT Findings

                  • MR Findings

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Gross Pathologic & Surgical Features

                          CLINICAL ISSUES

                          • Presentation

                            • Natural History & Prognosis

                              • Treatment

                                DIAGNOSTIC CHECKLIST

                                • Consider

                                  Selected References

                                  1. Brockmeyer D: The complex Chiari malformation: an evolution of understanding. Pediatr Radiol. 44(11):1345-6, 2014
                                  2. Middlebrooks EH et al: Normal relationship of the cervicomedullary junction with the obex and olivary bodies: a comparison of cadaveric dissection and in vivo diffusion tensor imaging. Surg Radiol Anat. ePub, 2014
                                  3. Moore HE et al: Magnetic resonance imaging features of complex Chiari malformation variant of Chiari 1 malformation. Pediatr Radiol. 44(11):1403-11, 2014
                                  4. Bollo RJ et al: Complex Chiari malformations in children: an analysis of preoperative risk factors for occipitocervical fusion. J Neurosurg Pediatr. 10(2):134-41, 2012
                                  5. Brockmeyer DL: The complex Chiari: issues and management strategies. Neurol Sci. 32 Suppl 3:S345-7, 2011
                                  6. Dufton JA et al: Posterior fossa measurements in patients with and without Chiari I malformation. Can J Neurol Sci. 38(3):452-5, 2011
                                  7. Kim IK et al: Chiari 1.5 malformation : an advanced form of Chiari I malformation. J Korean Neurosurg Soc. 48(4):375-9, 2010
                                  8. Tubbs RS et al: A critical analysis of the Chiari 1.5 malformation. J Neurosurg. 101(2 Suppl):179-83, 2004
                                  Related Anatomy
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                                  Related Differential Diagnoses
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                                  References
                                  Tables

                                  Tables

                                  KEY FACTS

                                  • Terminology

                                    • Imaging

                                      • Top Differential Diagnoses

                                        • Pathology

                                          • Clinical Issues

                                            • Diagnostic Checklist

                                              TERMINOLOGY

                                              • Abbreviations

                                                • Complex Chiari malformation (CCM), Chiari 1.5
                                              • Definitions

                                                • Caudal cerebellar tonsil and brainstem herniation with dorsal cervicomedullary "bump"
                                                • Frequently associated craniovertebral junction (CVJ) anomalies

                                              IMAGING

                                              • General Features

                                                • CT Findings

                                                  • MR Findings

                                                    DIFFERENTIAL DIAGNOSIS

                                                      PATHOLOGY

                                                      • General Features

                                                        • Gross Pathologic & Surgical Features

                                                          CLINICAL ISSUES

                                                          • Presentation

                                                            • Natural History & Prognosis

                                                              • Treatment

                                                                DIAGNOSTIC CHECKLIST

                                                                • Consider

                                                                  Selected References

                                                                  1. Brockmeyer D: The complex Chiari malformation: an evolution of understanding. Pediatr Radiol. 44(11):1345-6, 2014
                                                                  2. Middlebrooks EH et al: Normal relationship of the cervicomedullary junction with the obex and olivary bodies: a comparison of cadaveric dissection and in vivo diffusion tensor imaging. Surg Radiol Anat. ePub, 2014
                                                                  3. Moore HE et al: Magnetic resonance imaging features of complex Chiari malformation variant of Chiari 1 malformation. Pediatr Radiol. 44(11):1403-11, 2014
                                                                  4. Bollo RJ et al: Complex Chiari malformations in children: an analysis of preoperative risk factors for occipitocervical fusion. J Neurosurg Pediatr. 10(2):134-41, 2012
                                                                  5. Brockmeyer DL: The complex Chiari: issues and management strategies. Neurol Sci. 32 Suppl 3:S345-7, 2011
                                                                  6. Dufton JA et al: Posterior fossa measurements in patients with and without Chiari I malformation. Can J Neurol Sci. 38(3):452-5, 2011
                                                                  7. Kim IK et al: Chiari 1.5 malformation : an advanced form of Chiari I malformation. J Korean Neurosurg Soc. 48(4):375-9, 2010
                                                                  8. Tubbs RS et al: A critical analysis of the Chiari 1.5 malformation. J Neurosurg. 101(2 Suppl):179-83, 2004