REVIEWArachnoid cysts in paediatricsSarwar, Shaheeraa; Rocker, Joshuab Author Information aPGY-2 at Cohen Children's Medical Center 269-01 76th Ave, New Hyde Park, NY bDivision Chief, Pediatric Emergency Medicine, Cohen Children's Medical Center, Associate Professor of Pediatrics and Emergency Medicine, Zucker School of Medicine at Hofstra/Northwell Correspondence to Shaheera Sarwar, MD, MS, Pediatric Emergency Medicine, PGY-2 at Cohen Children's Medical Center, 269-01 76th Ave, New Hyde Park, NY, USA. Tel: +1 732 642 4480; e-mail: [email protected] Current Opinion in Pediatrics ():10.1097/MOP.0000000000001219, January 25, 2023. | DOI: 10.1097/MOP.0000000000001219 Buy PAP Metrics Abstract Purpose of review Arachnoid cysts are incidentally found on neuroimaging at an increasing rate in the paediatric population. Hence, learning their clinical implications to better inform families is important. The purpose of this review is to outline the current understanding of epidemiology, disease and clinical features based on location, imaging and management of arachnoid cysts in paediatrics. Recent findings The prevalence of arachnoid cysts is 2.6% in paediatrics, with greater than 90% being asymptomatic. When they do cause symptoms, it is based primarily on their location and size. The most accurate diagnostic modality is MRI. Recent literature focuses primarily on the origin of arachnoid cysts, new approaches to treating symptomatic arachnoid cysts and long-term implications for patients. Summary Incidental arachnoid cysts are being found most often due to the more frequent use of neuroimaging. There is a higher prevalence for arachnoid cysts in men and they are more commonly found on the left side. Despite their impressive size or location, greater than 90% of these lesions are asymptomatic and require no intervention. However, follow up with neurosurgery to help determine the clinical significance of these lesions is essential. Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.