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Arachnoid Cyst
Luke L. Linscott, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • Arachnoid cyst (AC)
              • Synonyms

                • Subarachnoid cyst
              • Definitions

                • Focal extraaxial CSF collection lined by arachnoid; generally lacks free communication with ventricles or subarachnoid space

              IMAGING

              • General Features

                • CT Findings

                  • MR Findings

                    • Ultrasonographic Findings

                      • Nuclear Medicine Findings

                        • Imaging Recommendations

                          DIFFERENTIAL DIAGNOSIS

                            PATHOLOGY

                            • General Features

                              • Staging, Grading, & Classification

                                • Gross Pathologic & Surgical Features

                                  • Microscopic Features

                                    CLINICAL ISSUES

                                    • Presentation

                                      • Demographics

                                        • Natural History & Prognosis

                                          • Treatment

                                            DIAGNOSTIC CHECKLIST

                                            • Consider

                                              • Image Interpretation Pearls

                                                Selected References

                                                1. Beresford C et al: Prenatal diagnosis of arachnoid cysts: a case series and systematic review. Childs Nerv Syst. 36(4):729-41, 2020
                                                2. Amelot A et al: Microsurgical, endoscopic, and shunt management of pediatric temporosylvian arachnoid cysts: a comparative study. J Neurosurg Pediatr. 1-9, 2019
                                                3. Jafrani R et al: Intracranial arachnoid cysts: Pediatric neurosurgery update. Surg Neurol Int. 10:15, 2019
                                                4. Kim KH et al: Neurocognitive profile in children with arachnoid cysts before and after surgical intervention. Childs Nerv Syst. 35(3):517-22, 2019
                                                5. Yahal O et al: Prenatal diagnosis of arachnoid cysts: MRI features and neurodevelopmental outcome. Eur J Radiol. 113:232-7, 2019
                                                6. André A et al: Suprasellar arachnoid cysts: toward a new simple classification based on prognosis and treatment modality. Neurosurgery. 78(3):370-80, 2016
                                                7. Rogers AJ et al: Children with arachnoid cysts who sustain blunt head trauma: injury mechanisms and outcomes. Acad Emerg Med. 23(3):358-61, 2016
                                                8. Choi JW et al: Stricter indications are recommended for fenestration surgery in intracranial arachnoid cysts of children. Childs Nerv Syst. 31(1):77-86, 2015
                                                9. De Keersmaecker B et al: Outcome of 12 antenatally diagnosed fetal arachnoid cysts: case series and review of the literature. Eur J Paediatr Neurol. 19(2):114-21, 2015
                                                10. Huang JH et al: Analysis on clinical characteristics of intracranial arachnoid cysts in 488 pediatric cases. Int J Clin Exp Med. 8(10):18343-50, 2015
                                                11. Tan Z et al: Children with intracranial arachnoid cysts: classification and treatment. Medicine (Baltimore). 94(44):e1749, 2015
                                                12. Ali ZS et al: Pediatric intracranial arachnoid cysts: comparative effectiveness of surgical treatment options. Childs Nerv Syst. 30(3):461-9, 2014
                                                13. Evangelou P et al: Operative management of idiopathic spinal intradural arachnoid cysts in children: a systematic review. Childs Nerv Syst. 29(4):657-64, 2013
                                                14. Al-Holou WN et al: Prevalence and natural history of arachnoid cysts in children. J Neurosurg Pediatr. 5(6):578-85, 2010
                                                15. Alexiou GA et al: Shunting for the treatment of arachnoid cysts in children. Neurosurgery. 67(6):1632-6; discussion 1636, 2010
                                                16. Algin O et al: Phase-contrast cine MRI versus MR cisternography on the evaluation of the communication between intraventricular arachnoid cysts and neighbouring cerebrospinal fluid spaces. Neuroradiology. 51(5):305-12, 2009
                                                17. Nakagawa A et al: Usefulness of constructive interference in steady state (CISS) imaging for the diagnosis and treatment of a large extradural spinal arachnoid cyst. Minim Invasive Neurosurg. 47(6):369-72, 2004
                                                18. Alkadhi H et al: Somatomotor functional MRI in a large congenital arachnoid cyst. Neuroradiology. 45(3):153-6, 2003
                                                19. Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
                                                20. Gosalakkal JA: Intracranial arachnoid cysts in children: a review of pathogenesis, clinical features, and management. Pediatr Neurol. 26(2):93-8, 2002
                                                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

                                                              • Subarachnoid cyst
                                                            • Definitions

                                                              • Focal extraaxial CSF collection lined by arachnoid; generally lacks free communication with ventricles or subarachnoid space

                                                            IMAGING

                                                            • General Features

                                                              • CT Findings

                                                                • MR Findings

                                                                  • Ultrasonographic Findings

                                                                    • Nuclear Medicine Findings

                                                                      • Imaging Recommendations

                                                                        DIFFERENTIAL DIAGNOSIS

                                                                          PATHOLOGY

                                                                          • General Features

                                                                            • Staging, Grading, & Classification

                                                                              • Gross Pathologic & Surgical Features

                                                                                • Microscopic Features

                                                                                  CLINICAL ISSUES

                                                                                  • Presentation

                                                                                    • Demographics

                                                                                      • Natural History & Prognosis

                                                                                        • Treatment

                                                                                          DIAGNOSTIC CHECKLIST

                                                                                          • Consider

                                                                                            • Image Interpretation Pearls

                                                                                              Selected References

                                                                                              1. Beresford C et al: Prenatal diagnosis of arachnoid cysts: a case series and systematic review. Childs Nerv Syst. 36(4):729-41, 2020
                                                                                              2. Amelot A et al: Microsurgical, endoscopic, and shunt management of pediatric temporosylvian arachnoid cysts: a comparative study. J Neurosurg Pediatr. 1-9, 2019
                                                                                              3. Jafrani R et al: Intracranial arachnoid cysts: Pediatric neurosurgery update. Surg Neurol Int. 10:15, 2019
                                                                                              4. Kim KH et al: Neurocognitive profile in children with arachnoid cysts before and after surgical intervention. Childs Nerv Syst. 35(3):517-22, 2019
                                                                                              5. Yahal O et al: Prenatal diagnosis of arachnoid cysts: MRI features and neurodevelopmental outcome. Eur J Radiol. 113:232-7, 2019
                                                                                              6. André A et al: Suprasellar arachnoid cysts: toward a new simple classification based on prognosis and treatment modality. Neurosurgery. 78(3):370-80, 2016
                                                                                              7. Rogers AJ et al: Children with arachnoid cysts who sustain blunt head trauma: injury mechanisms and outcomes. Acad Emerg Med. 23(3):358-61, 2016
                                                                                              8. Choi JW et al: Stricter indications are recommended for fenestration surgery in intracranial arachnoid cysts of children. Childs Nerv Syst. 31(1):77-86, 2015
                                                                                              9. De Keersmaecker B et al: Outcome of 12 antenatally diagnosed fetal arachnoid cysts: case series and review of the literature. Eur J Paediatr Neurol. 19(2):114-21, 2015
                                                                                              10. Huang JH et al: Analysis on clinical characteristics of intracranial arachnoid cysts in 488 pediatric cases. Int J Clin Exp Med. 8(10):18343-50, 2015
                                                                                              11. Tan Z et al: Children with intracranial arachnoid cysts: classification and treatment. Medicine (Baltimore). 94(44):e1749, 2015
                                                                                              12. Ali ZS et al: Pediatric intracranial arachnoid cysts: comparative effectiveness of surgical treatment options. Childs Nerv Syst. 30(3):461-9, 2014
                                                                                              13. Evangelou P et al: Operative management of idiopathic spinal intradural arachnoid cysts in children: a systematic review. Childs Nerv Syst. 29(4):657-64, 2013
                                                                                              14. Al-Holou WN et al: Prevalence and natural history of arachnoid cysts in children. J Neurosurg Pediatr. 5(6):578-85, 2010
                                                                                              15. Alexiou GA et al: Shunting for the treatment of arachnoid cysts in children. Neurosurgery. 67(6):1632-6; discussion 1636, 2010
                                                                                              16. Algin O et al: Phase-contrast cine MRI versus MR cisternography on the evaluation of the communication between intraventricular arachnoid cysts and neighbouring cerebrospinal fluid spaces. Neuroradiology. 51(5):305-12, 2009
                                                                                              17. Nakagawa A et al: Usefulness of constructive interference in steady state (CISS) imaging for the diagnosis and treatment of a large extradural spinal arachnoid cyst. Minim Invasive Neurosurg. 47(6):369-72, 2004
                                                                                              18. Alkadhi H et al: Somatomotor functional MRI in a large congenital arachnoid cyst. Neuroradiology. 45(3):153-6, 2003
                                                                                              19. Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
                                                                                              20. Gosalakkal JA: Intracranial arachnoid cysts in children: a review of pathogenesis, clinical features, and management. Pediatr Neurol. 26(2):93-8, 2002