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CPA Arachnoid Cyst
H. Ric Harnsberger, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Abbreviations

              • Arachnoid cyst (AC)
            • Synonyms

              • Primary or congenital AC, subarachnoid cyst
            • Definitions

              • Developmental arachnoid duplication anomaly creating CSF-filled sac

            IMAGING

            • General Features

              • CT Findings

                • MR Findings

                  • Ultrasonographic Findings

                    • 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

                                          • Reporting Tips

                                            Selected References

                                            1. Olaya JE et al: Endoscopic fenestration of a cerebellopontine angle arachnoid cyst resulting in complete recovery from sensorineural hearing loss and facial nerve palsy. J Neurosurg Pediatr. 7(2):157-60, 2011
                                            2. Boutarbouch M et al: Management of intracranial arachnoid cysts: institutional experience with initial 32 cases and review of the literature. Clin Neurol Neurosurg. 110(1):1-7, 2008
                                            3. Marin-Sanabria EA et al: Evaluation of the management of arachnoid cyst of the posterior fossa in pediatric population: experience over 27 years. Childs Nerv Syst. 23(5):535-42, 2007
                                            4. Helland CA et al: A population-based study of intracranial arachnoid cysts: clinical and neuroimaging outcomes following surgical cyst decompression in children. J Neurosurg. 105(5 Suppl):385-90, 2006
                                            5. Osborn AG et al: Intracranial cysts: radiologic-pathologic correlation and imaging approach. Radiology. 239(3):650-64, 2006
                                            6. Tang L et al: Diffusion-weighted imaging distinguishes recurrent epidermoid neoplasm from postoperative arachnoid cyst in the lumbosacral spine. J Comput Assist Tomogr. 30(3):507-9, 2006
                                            7. Alaani A et al: Cerebellopontine angle arachnoid cysts in adult patients: what is the appropriate management? J Laryngol Otol. 119(5):337-41, 2005
                                            8. Eskandary H et al: Incidental findings in brain computed tomography scans of 3000 head trauma patients. Surg Neurol. 63(6):550-3; discussion 553, 2005
                                            9. Yildiz H et al: evaluation of communication between intracranial arachnoid cysts and cisterns with phase-contrast cine MR imaging. AJNR Am J Neuroradiol. 26(1):145-51, 2005
                                            10. Sinha S et al: Familial posterior fossa arachnoid cyst. Childs Nerv Syst. 20(2):100-3, 2004
                                            11. Boltshauser E et al: Outcome in children with space-occupying posterior fossa arachnoid cysts. Neuropediatrics. 33(3):118-21, 2002
                                            12. Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
                                            13. Ottaviani F et al: Arachnoid cyst of the cranial posterior fossa causing sensorineural hearing loss and tinnitus: a case report. Eur Arch Otorhinolaryngol. 259(6):306-8, 2002
                                            14. Gangemi M et al: Endoscopic surgery for large posterior fossa arachnoid cysts. Minim Invasive Neurosurg. 44(1):21-4, 2001
                                            15. Samii M et al: Arachnoid cysts of the posterior fossa. Surg Neurol. 51(4):376-82, 1999
                                            16. Shukla R et al: Posterior fossa arachnoid cyst presenting as high cervical cord compression. Br J Neurosurg. 12(3):271-3, 1998
                                            17. Jallo GI et al: Arachnoid cysts of the cerebellopontine angle: diagnosis and surgery. Neurosurgery. 40(1):31-7; discussion 37-8, 1997
                                            18. Higashi S et al: Hemifacial spasm associated with a cerebellopontine angle arachnoid cyst in a young adult. Surg Neurol. 37(4):289-92, 1992
                                            19. Babu R et al: Arachnoid cyst of the cerebellopontine angle manifesting as contralateral trigeminal neuralgia: case report. Neurosurgery. 28(6):886-7, 1991
                                            20. Blaicher W et al: Magnetic resonance imaging and ultrasound in the assessment of the fetal central nervous system. J Perinat Med. 31(6):459-68, 2003;31(6):459-68.
                                            Related Anatomy
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                                            Related Differential Diagnoses
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                                            References
                                            Tables

                                            Tables

                                            KEY FACTS

                                            • Terminology

                                              • Imaging

                                                • Top Differential Diagnoses

                                                  • Clinical Issues

                                                    • Diagnostic Checklist

                                                      TERMINOLOGY

                                                      • Abbreviations

                                                        • Arachnoid cyst (AC)
                                                      • Synonyms

                                                        • Primary or congenital AC, subarachnoid cyst
                                                      • Definitions

                                                        • Developmental arachnoid duplication anomaly creating CSF-filled sac

                                                      IMAGING

                                                      • General Features

                                                        • CT Findings

                                                          • MR Findings

                                                            • Ultrasonographic Findings

                                                              • 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

                                                                                    • Reporting Tips

                                                                                      Selected References

                                                                                      1. Olaya JE et al: Endoscopic fenestration of a cerebellopontine angle arachnoid cyst resulting in complete recovery from sensorineural hearing loss and facial nerve palsy. J Neurosurg Pediatr. 7(2):157-60, 2011
                                                                                      2. Boutarbouch M et al: Management of intracranial arachnoid cysts: institutional experience with initial 32 cases and review of the literature. Clin Neurol Neurosurg. 110(1):1-7, 2008
                                                                                      3. Marin-Sanabria EA et al: Evaluation of the management of arachnoid cyst of the posterior fossa in pediatric population: experience over 27 years. Childs Nerv Syst. 23(5):535-42, 2007
                                                                                      4. Helland CA et al: A population-based study of intracranial arachnoid cysts: clinical and neuroimaging outcomes following surgical cyst decompression in children. J Neurosurg. 105(5 Suppl):385-90, 2006
                                                                                      5. Osborn AG et al: Intracranial cysts: radiologic-pathologic correlation and imaging approach. Radiology. 239(3):650-64, 2006
                                                                                      6. Tang L et al: Diffusion-weighted imaging distinguishes recurrent epidermoid neoplasm from postoperative arachnoid cyst in the lumbosacral spine. J Comput Assist Tomogr. 30(3):507-9, 2006
                                                                                      7. Alaani A et al: Cerebellopontine angle arachnoid cysts in adult patients: what is the appropriate management? J Laryngol Otol. 119(5):337-41, 2005
                                                                                      8. Eskandary H et al: Incidental findings in brain computed tomography scans of 3000 head trauma patients. Surg Neurol. 63(6):550-3; discussion 553, 2005
                                                                                      9. Yildiz H et al: evaluation of communication between intracranial arachnoid cysts and cisterns with phase-contrast cine MR imaging. AJNR Am J Neuroradiol. 26(1):145-51, 2005
                                                                                      10. Sinha S et al: Familial posterior fossa arachnoid cyst. Childs Nerv Syst. 20(2):100-3, 2004
                                                                                      11. Boltshauser E et al: Outcome in children with space-occupying posterior fossa arachnoid cysts. Neuropediatrics. 33(3):118-21, 2002
                                                                                      12. Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
                                                                                      13. Ottaviani F et al: Arachnoid cyst of the cranial posterior fossa causing sensorineural hearing loss and tinnitus: a case report. Eur Arch Otorhinolaryngol. 259(6):306-8, 2002
                                                                                      14. Gangemi M et al: Endoscopic surgery for large posterior fossa arachnoid cysts. Minim Invasive Neurosurg. 44(1):21-4, 2001
                                                                                      15. Samii M et al: Arachnoid cysts of the posterior fossa. Surg Neurol. 51(4):376-82, 1999
                                                                                      16. Shukla R et al: Posterior fossa arachnoid cyst presenting as high cervical cord compression. Br J Neurosurg. 12(3):271-3, 1998
                                                                                      17. Jallo GI et al: Arachnoid cysts of the cerebellopontine angle: diagnosis and surgery. Neurosurgery. 40(1):31-7; discussion 37-8, 1997
                                                                                      18. Higashi S et al: Hemifacial spasm associated with a cerebellopontine angle arachnoid cyst in a young adult. Surg Neurol. 37(4):289-92, 1992
                                                                                      19. Babu R et al: Arachnoid cyst of the cerebellopontine angle manifesting as contralateral trigeminal neuralgia: case report. Neurosurgery. 28(6):886-7, 1991
                                                                                      20. Blaicher W et al: Magnetic resonance imaging and ultrasound in the assessment of the fetal central nervous system. J Perinat Med. 31(6):459-68, 2003;31(6):459-68.