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CPA-IAC Arachnoid Cyst
Surjith Vattoth, MD, FRCR; H. Ric Harnsberger, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • Arachnoid cyst (AC)
              • Synonyms

                • Primary or congenital AC, subarachnoid cyst
              • Definitions

                • Developmental arachnoid duplication anomaly creating intraarachnoid 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. Nadi M et al: Resolution of middle fossa arachnoid cyst after minor head trauma - stages of resolution on MRI: case report and literature review. Pediatr Neurosurg. 52(5):346-50, 2017
                                              2. Tan Z et al: Children with intracranial arachnoid cysts: classification and treatment. Medicine (Baltimore). 94(44):e1749, 2015
                                              3. Karegowda LH et al: A rare case of racemose neurocysticercosis of the posterior fossa. BMJ Case Rep, 2014
                                              4. Liu Z et al: Arachnoid cysts with subdural hematoma or intracystic hemorrhage in children. Pediatr Emerg Care. 30(5):345-51, 2014
                                              5. Wang X et al: CT cisternography in intracranial symptomatic arachnoid cysts: classification and treatment. J Neurol Sci. 318(1-2):125-30, 2012
                                              6. Gangemi M et al: Endoscopy versus microsurgical cyst excision and shunting for treating intracranial arachnoid cysts. J Neurosurg Pediatr. 8(2):158-64, 2011
                                              7. Jayarao M et al: Recovery of sensorineural hearing loss following operative management of a posterior fossa arachnoid cyst. Case report. J Neurosurg Pediatr. 4(2):121-4, 2009
                                              8. 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
                                              9. 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
                                              10. 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
                                              11. Osborn AG et al: Intracranial cysts: radiologic-pathologic correlation and imaging approach. Radiology. 239(3):650-64, 2006
                                              12. 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
                                              13. Alaani A et al: Cerebellopontine angle arachnoid cysts in adult patients: what is the appropriate management? J Laryngol Otol. 119(5):337-41, 2005
                                              14. 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
                                              15. 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
                                              16. Sinha S et al: Familial posterior fossa arachnoid cyst. Childs Nerv Syst. 20(2):100-3, 2004
                                              17. Boltshauser E et al: Outcome in children with space-occupying posterior fossa arachnoid cysts. Neuropediatrics. 33(3):118-21, 2002
                                              18. Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
                                              19. 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
                                              20. Gangemi M et al: Endoscopic surgery for large posterior fossa arachnoid cysts. Minim Invasive Neurosurg. 44(1):21-4, 2001
                                              21. Samii M et al: Arachnoid cysts of the posterior fossa. Surg Neurol. 51(4):376-82, 1999
                                              22. Shukla R et al: Posterior fossa arachnoid cyst presenting as high cervical cord compression. Br J Neurosurg. 12(3):271-3, 1998
                                              23. Jallo GI et al: Arachnoid cysts of the cerebellopontine angle: diagnosis and surgery. Neurosurgery. 40(1):31-7; discussion 37-8, 1997
                                              24. Higashi S et al: Hemifacial spasm associated with a cerebellopontine angle arachnoid cyst in a young adult. Surg Neurol. 37(4):289-92, 1992
                                              25. Babu R et al: Arachnoid cyst of the cerebellopontine angle manifesting as contralateral trigeminal neuralgia: case report. Neurosurgery. 28(6):886-7, 1991
                                              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

                                                            • Arachnoid cyst (AC)
                                                          • Synonyms

                                                            • Primary or congenital AC, subarachnoid cyst
                                                          • Definitions

                                                            • Developmental arachnoid duplication anomaly creating intraarachnoid 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. Nadi M et al: Resolution of middle fossa arachnoid cyst after minor head trauma - stages of resolution on MRI: case report and literature review. Pediatr Neurosurg. 52(5):346-50, 2017
                                                                                          2. Tan Z et al: Children with intracranial arachnoid cysts: classification and treatment. Medicine (Baltimore). 94(44):e1749, 2015
                                                                                          3. Karegowda LH et al: A rare case of racemose neurocysticercosis of the posterior fossa. BMJ Case Rep, 2014
                                                                                          4. Liu Z et al: Arachnoid cysts with subdural hematoma or intracystic hemorrhage in children. Pediatr Emerg Care. 30(5):345-51, 2014
                                                                                          5. Wang X et al: CT cisternography in intracranial symptomatic arachnoid cysts: classification and treatment. J Neurol Sci. 318(1-2):125-30, 2012
                                                                                          6. Gangemi M et al: Endoscopy versus microsurgical cyst excision and shunting for treating intracranial arachnoid cysts. J Neurosurg Pediatr. 8(2):158-64, 2011
                                                                                          7. Jayarao M et al: Recovery of sensorineural hearing loss following operative management of a posterior fossa arachnoid cyst. Case report. J Neurosurg Pediatr. 4(2):121-4, 2009
                                                                                          8. 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
                                                                                          9. 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
                                                                                          10. 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
                                                                                          11. Osborn AG et al: Intracranial cysts: radiologic-pathologic correlation and imaging approach. Radiology. 239(3):650-64, 2006
                                                                                          12. 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
                                                                                          13. Alaani A et al: Cerebellopontine angle arachnoid cysts in adult patients: what is the appropriate management? J Laryngol Otol. 119(5):337-41, 2005
                                                                                          14. 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
                                                                                          15. 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
                                                                                          16. Sinha S et al: Familial posterior fossa arachnoid cyst. Childs Nerv Syst. 20(2):100-3, 2004
                                                                                          17. Boltshauser E et al: Outcome in children with space-occupying posterior fossa arachnoid cysts. Neuropediatrics. 33(3):118-21, 2002
                                                                                          18. Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
                                                                                          19. 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
                                                                                          20. Gangemi M et al: Endoscopic surgery for large posterior fossa arachnoid cysts. Minim Invasive Neurosurg. 44(1):21-4, 2001
                                                                                          21. Samii M et al: Arachnoid cysts of the posterior fossa. Surg Neurol. 51(4):376-82, 1999
                                                                                          22. Shukla R et al: Posterior fossa arachnoid cyst presenting as high cervical cord compression. Br J Neurosurg. 12(3):271-3, 1998
                                                                                          23. Jallo GI et al: Arachnoid cysts of the cerebellopontine angle: diagnosis and surgery. Neurosurgery. 40(1):31-7; discussion 37-8, 1997
                                                                                          24. Higashi S et al: Hemifacial spasm associated with a cerebellopontine angle arachnoid cyst in a young adult. Surg Neurol. 37(4):289-92, 1992
                                                                                          25. Babu R et al: Arachnoid cyst of the cerebellopontine angle manifesting as contralateral trigeminal neuralgia: case report. Neurosurgery. 28(6):886-7, 1991