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Atypical and Malignant Meningioma
Anne G. Osborn, MD, FACR; Majda M. Thurnher, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • Atypical meningioma (AM), malignant meningioma (MM)
              • Definitions

                • Typical (benign) meningioma = WHO grade 1
                  • Common meningioma (CM)
                • Atypical meningioma = WHO grade 2
                  • Papillary, clear cell meningiomas (CCM)
                • Malignant meningioma = WHO grade 3
                  • Anaplastic meningioma

              IMAGING

              • General Features

                • CT Findings

                  • MR Findings

                    • Angiographic Findings

                      • Nuclear Medicine Findings

                        • Imaging Recommendations

                          DIFFERENTIAL DIAGNOSIS

                            PATHOLOGY

                            • General Features

                              • Staging, Grading, & Classification

                                • Gross Pathologic & Surgical Features

                                  • Microscopic Features

                                    CLINICAL ISSUES

                                    • Demographics

                                      • Natural History & Prognosis

                                        • Treatment

                                          DIAGNOSTIC CHECKLIST

                                          • Image Interpretation Pearls

                                            Selected References

                                            1. Aboukais R et al: Grade 2 meningioma and radiosurgery. J Neurosurg. 1-6, 2015
                                            2. Cao X et al: Survival rates, prognostic factors and treatment of anaplastic meningiomas. J Clin Neurosci. ePub, 2015
                                            3. Shibuya M: Pathology and molecular genetics of meningioma: recent advances. Neurol Med Chir (Tokyo). 55(1):14-27, 2015
                                            4. Smith MJ: Germline and somatic mutations in meningiomas. Cancer Genet. ePub, 2015
                                            5. Wang M et al: MicroRNA-224 targets ERG2 and contributes to malignant progressions of meningioma. Biochem Biophys Res Commun. ePub, 2015
                                            6. Moradi A et al: Pathodiagnostic parameters for meningioma grading. J Clin Neurosci. 15(12):1370-5, 2008
                                            7. Nagar VA et al: Diffusion-weighted MR imaging: diagnosing atypical or malignant meningiomas and detecting tumor dedifferentiation. AJNR Am J Neuroradiol. 29(6):1147-52, 2008
                                            8. Toh CH et al: Differentiation between classic and atypical meningiomas with use of diffusion tensor imaging. AJNR Am J Neuroradiol. 29(9):1630-5, 2008
                                            9. Jain D et al: Clear cell meningioma, an uncommon variant of meningioma: a clinicopathologic study of nine cases. J Neurooncol. 81(3):315-21, 2007
                                            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

                                                          • Atypical meningioma (AM), malignant meningioma (MM)
                                                        • Definitions

                                                          • Typical (benign) meningioma = WHO grade 1
                                                            • Common meningioma (CM)
                                                          • Atypical meningioma = WHO grade 2
                                                            • Papillary, clear cell meningiomas (CCM)
                                                          • Malignant meningioma = WHO grade 3
                                                            • Anaplastic meningioma

                                                        IMAGING

                                                        • General Features

                                                          • CT Findings

                                                            • MR Findings

                                                              • Angiographic Findings

                                                                • Nuclear Medicine Findings

                                                                  • Imaging Recommendations

                                                                    DIFFERENTIAL DIAGNOSIS

                                                                      PATHOLOGY

                                                                      • General Features

                                                                        • Staging, Grading, & Classification

                                                                          • Gross Pathologic & Surgical Features

                                                                            • Microscopic Features

                                                                              CLINICAL ISSUES

                                                                              • Demographics

                                                                                • Natural History & Prognosis

                                                                                  • Treatment

                                                                                    DIAGNOSTIC CHECKLIST

                                                                                    • Image Interpretation Pearls

                                                                                      Selected References

                                                                                      1. Aboukais R et al: Grade 2 meningioma and radiosurgery. J Neurosurg. 1-6, 2015
                                                                                      2. Cao X et al: Survival rates, prognostic factors and treatment of anaplastic meningiomas. J Clin Neurosci. ePub, 2015
                                                                                      3. Shibuya M: Pathology and molecular genetics of meningioma: recent advances. Neurol Med Chir (Tokyo). 55(1):14-27, 2015
                                                                                      4. Smith MJ: Germline and somatic mutations in meningiomas. Cancer Genet. ePub, 2015
                                                                                      5. Wang M et al: MicroRNA-224 targets ERG2 and contributes to malignant progressions of meningioma. Biochem Biophys Res Commun. ePub, 2015
                                                                                      6. Moradi A et al: Pathodiagnostic parameters for meningioma grading. J Clin Neurosci. 15(12):1370-5, 2008
                                                                                      7. Nagar VA et al: Diffusion-weighted MR imaging: diagnosing atypical or malignant meningiomas and detecting tumor dedifferentiation. AJNR Am J Neuroradiol. 29(6):1147-52, 2008
                                                                                      8. Toh CH et al: Differentiation between classic and atypical meningiomas with use of diffusion tensor imaging. AJNR Am J Neuroradiol. 29(9):1630-5, 2008
                                                                                      9. Jain D et al: Clear cell meningioma, an uncommon variant of meningioma: a clinicopathologic study of nine cases. J Neurooncol. 81(3):315-21, 2007