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Lateral Meningocele
Kevin R. Moore, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Synonyms

                • Lateral meningocele (LM), lateral thoracic meningocele (LTM), lateral lumbar meningocele (LLM)
              • Definitions

                • Meningeal dysplasia → CSF-filled dural/arachnoidal sac protrudes laterally through neural foramen

              IMAGING

              • General Features

                • Radiographic Findings

                  • CT Findings

                    • MR Findings

                      • Ultrasonographic Findings

                        • Nonvascular Interventions

                          • Imaging Recommendations

                            DIFFERENTIAL DIAGNOSIS

                              PATHOLOGY

                              • General Features

                                • Gross Pathologic & Surgical Features

                                  • Microscopic Features

                                    CLINICAL ISSUES

                                    • Presentation

                                      • Demographics

                                        • Natural History & Prognosis

                                          • Treatment

                                            DIAGNOSTIC CHECKLIST

                                            • Consider

                                              • Image Interpretation Pearls

                                                Selected References

                                                1. Brown EC et al: Neurosurgical management in lateral meningocele syndrome: case report. J Neurosurg Pediatr. 19(2):232-8, 2017
                                                2. Prasad GR et al: Lateral meningomyelocele in a neonate: a case report. J Neonatal Surg. 5(1):4, 2016
                                                3. Castori M et al: Late diagnosis of lateral meningocele syndrome in a 55-year-old woman with symptoms of joint instability and chronic musculoskeletal pain. Am J Med Genet A. 164(2):528-34, 2014
                                                4. Alves D et al: Lateral meningocele syndrome: additional report and further evidence supporting a connective tissue basis. Am J Med Genet A. 161A(7):1768-72, 2013
                                                5. Kumar BE et al: Bilateral multiple level lateral meningocoele. J Clin Imaging Sci. 3:1, 2013
                                                6. Kumar V et al: Spontaneous subarachnoid pleural fistula: a rare complication of lateral thoracic meningocele. Neurol India. 58(3):466-7, 2010
                                                7. Haddad R: Multiple asymptomatic lateral thoracic meningocele. Eur J Cardiothorac Surg. 33(1):113, 2008
                                                8. Yen CP et al: Epidermoid cysts associated with thoracic meningocele. Acta Neurochir (Wien). 150(3):305-8; discussion 308-9, 2008
                                                9. Fiss I et al: Rapidly progressive paraplegia due to an extradural lumbar meningocele mimicking a cyst. Case report. J Neurosurg Spine. 7(1):75-9, 2007
                                                10. Pettorini BL et al: Thoracic lipomeningocele associated with diastematomyelia, tethered spinal cord, and hydrocephalus. Case report. J Neurosurg. 106(5 Suppl):394-7, 2007
                                                11. Kaur N et al: Lateral sacral meningomyelocele as a gluteal swelling--an unusual presentation. J Indian Med Assoc. 103(10):554, 556, 2005
                                                12. Oner AY et al: Isolated true anterior thoracic meningocele. AJNR Am J Neuroradiol. 25(10):1828-30, 2004
                                                13. Kubota M et al: Lateral thoracic meningocele presenting as a retromediastinal mass. Br J Neurosurg. 16(6):607-8, 2002
                                                14. Baysefer A et al: Lateral intrathoracic meningocele associated with a spinal intradural arachnoid cyst. Pediatr Neurosurg. 35(2):107-10, 2001
                                                15. Barkovich A: Pediatric Neuroimaging. 3rd ed. Philadelphia: Lippincott-Raven. 398, 667, 2000
                                                16. Unsinn KM et al: US of the spinal cord in newborns: spectrum of normal findings, variants, congenital anomalies, and acquired diseases. Radiographics. 20(4):923-38, 2000
                                                17. Zibis AH et al: Unusual causes of spinal foraminal widening. Eur Radiol. 10(1):144-8, 2000
                                                18. Chen SS et al: Multiple bilateral thoracic meningoceles without neurofibromatosis: a case report. Zhonghua Yi Xue Za Zhi (Taipei). 61(12):736-40, 1998
                                                19. Ball W: Pediatric Neuroradiology. Philadelphia: Lippincott-Raven. 727, 1997
                                                20. Gripp KW et al: Lateral meningocele syndrome: three new patients and review of the literature. Am J Med Genet. 70(3):229-39, 1997
                                                21. Strollo DC et al: Primary mediastinal tumors: part II. Tumors of the middle and posterior mediastinum. Chest. 112(5):1344-57, 1997
                                                22. Gibbens DT et al: Chest case of the day. Lateral thoracic meningocele in a patient with neurofibromatosis. AJR Am J Roentgenol. 156(6):1299-300, 1991
                                                23. Nakasu Y et al: Thoracic meningocele in neurofibromatosis: CT and MR findings. J Comput Assist Tomogr. 15(6):1062-4, 1991
                                                24. Chee CP: Lateral thoracic meningocele associated with neurofibromatosis: total excision by posterolateral extradural approach. A case report. Spine. 14(1):129-31, 1989
                                                25. Richaud J: Spinal meningeal malformations in children (without meningoceles or meningomyeloceles). Childs Nerv Syst. 4(2):79-87, 1988
                                                26. Maiuri F et al: Lateral thoracic meningocele. Surg Neurol. 26(4):409-12, 1986
                                                27. Weinreb JC et al: CT metrizamide myelography in multiple bilateral intrathoracic meningoceles. J Comput Assist Tomogr. 8(2):324-6, 1984
                                                28. Erkulvrawatr S et al: Intrathoracic meningoceles and neurofibromatosis. Arch Neurol. 36(9):557-9, 1979
                                                29. Booth AE: Lateral thoracic meningocele. J Neurol Neurosurg Psychiatry. 32(2):111-5, 1969
                                                30. Bunner R: Lateral intrathoracic meningocele. Acta Radiol. 51(1):1-9, 1959
                                                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

                                                            • Synonyms

                                                              • Lateral meningocele (LM), lateral thoracic meningocele (LTM), lateral lumbar meningocele (LLM)
                                                            • Definitions

                                                              • Meningeal dysplasia → CSF-filled dural/arachnoidal sac protrudes laterally through neural foramen

                                                            IMAGING

                                                            • General Features

                                                              • Radiographic Findings

                                                                • CT Findings

                                                                  • MR Findings

                                                                    • Ultrasonographic Findings

                                                                      • Nonvascular Interventions

                                                                        • Imaging Recommendations

                                                                          DIFFERENTIAL DIAGNOSIS

                                                                            PATHOLOGY

                                                                            • General Features

                                                                              • Gross Pathologic & Surgical Features

                                                                                • Microscopic Features

                                                                                  CLINICAL ISSUES

                                                                                  • Presentation

                                                                                    • Demographics

                                                                                      • Natural History & Prognosis

                                                                                        • Treatment

                                                                                          DIAGNOSTIC CHECKLIST

                                                                                          • Consider

                                                                                            • Image Interpretation Pearls

                                                                                              Selected References

                                                                                              1. Brown EC et al: Neurosurgical management in lateral meningocele syndrome: case report. J Neurosurg Pediatr. 19(2):232-8, 2017
                                                                                              2. Prasad GR et al: Lateral meningomyelocele in a neonate: a case report. J Neonatal Surg. 5(1):4, 2016
                                                                                              3. Castori M et al: Late diagnosis of lateral meningocele syndrome in a 55-year-old woman with symptoms of joint instability and chronic musculoskeletal pain. Am J Med Genet A. 164(2):528-34, 2014
                                                                                              4. Alves D et al: Lateral meningocele syndrome: additional report and further evidence supporting a connective tissue basis. Am J Med Genet A. 161A(7):1768-72, 2013
                                                                                              5. Kumar BE et al: Bilateral multiple level lateral meningocoele. J Clin Imaging Sci. 3:1, 2013
                                                                                              6. Kumar V et al: Spontaneous subarachnoid pleural fistula: a rare complication of lateral thoracic meningocele. Neurol India. 58(3):466-7, 2010
                                                                                              7. Haddad R: Multiple asymptomatic lateral thoracic meningocele. Eur J Cardiothorac Surg. 33(1):113, 2008
                                                                                              8. Yen CP et al: Epidermoid cysts associated with thoracic meningocele. Acta Neurochir (Wien). 150(3):305-8; discussion 308-9, 2008
                                                                                              9. Fiss I et al: Rapidly progressive paraplegia due to an extradural lumbar meningocele mimicking a cyst. Case report. J Neurosurg Spine. 7(1):75-9, 2007
                                                                                              10. Pettorini BL et al: Thoracic lipomeningocele associated with diastematomyelia, tethered spinal cord, and hydrocephalus. Case report. J Neurosurg. 106(5 Suppl):394-7, 2007
                                                                                              11. Kaur N et al: Lateral sacral meningomyelocele as a gluteal swelling--an unusual presentation. J Indian Med Assoc. 103(10):554, 556, 2005
                                                                                              12. Oner AY et al: Isolated true anterior thoracic meningocele. AJNR Am J Neuroradiol. 25(10):1828-30, 2004
                                                                                              13. Kubota M et al: Lateral thoracic meningocele presenting as a retromediastinal mass. Br J Neurosurg. 16(6):607-8, 2002
                                                                                              14. Baysefer A et al: Lateral intrathoracic meningocele associated with a spinal intradural arachnoid cyst. Pediatr Neurosurg. 35(2):107-10, 2001
                                                                                              15. Barkovich A: Pediatric Neuroimaging. 3rd ed. Philadelphia: Lippincott-Raven. 398, 667, 2000
                                                                                              16. Unsinn KM et al: US of the spinal cord in newborns: spectrum of normal findings, variants, congenital anomalies, and acquired diseases. Radiographics. 20(4):923-38, 2000
                                                                                              17. Zibis AH et al: Unusual causes of spinal foraminal widening. Eur Radiol. 10(1):144-8, 2000
                                                                                              18. Chen SS et al: Multiple bilateral thoracic meningoceles without neurofibromatosis: a case report. Zhonghua Yi Xue Za Zhi (Taipei). 61(12):736-40, 1998
                                                                                              19. Ball W: Pediatric Neuroradiology. Philadelphia: Lippincott-Raven. 727, 1997
                                                                                              20. Gripp KW et al: Lateral meningocele syndrome: three new patients and review of the literature. Am J Med Genet. 70(3):229-39, 1997
                                                                                              21. Strollo DC et al: Primary mediastinal tumors: part II. Tumors of the middle and posterior mediastinum. Chest. 112(5):1344-57, 1997
                                                                                              22. Gibbens DT et al: Chest case of the day. Lateral thoracic meningocele in a patient with neurofibromatosis. AJR Am J Roentgenol. 156(6):1299-300, 1991
                                                                                              23. Nakasu Y et al: Thoracic meningocele in neurofibromatosis: CT and MR findings. J Comput Assist Tomogr. 15(6):1062-4, 1991
                                                                                              24. Chee CP: Lateral thoracic meningocele associated with neurofibromatosis: total excision by posterolateral extradural approach. A case report. Spine. 14(1):129-31, 1989
                                                                                              25. Richaud J: Spinal meningeal malformations in children (without meningoceles or meningomyeloceles). Childs Nerv Syst. 4(2):79-87, 1988
                                                                                              26. Maiuri F et al: Lateral thoracic meningocele. Surg Neurol. 26(4):409-12, 1986
                                                                                              27. Weinreb JC et al: CT metrizamide myelography in multiple bilateral intrathoracic meningoceles. J Comput Assist Tomogr. 8(2):324-6, 1984
                                                                                              28. Erkulvrawatr S et al: Intrathoracic meningoceles and neurofibromatosis. Arch Neurol. 36(9):557-9, 1979
                                                                                              29. Booth AE: Lateral thoracic meningocele. J Neurol Neurosurg Psychiatry. 32(2):111-5, 1969
                                                                                              30. Bunner R: Lateral intrathoracic meningocele. Acta Radiol. 51(1):1-9, 1959