RT Journal Article T1 Pediatric colloid cysts: a multinational, multicenter study. An IFNE-ISPN-ESPN collaboration. A1 Roth, Jonathan A1 Perekopaiko, Yurii A1 Kozyrev, Danil A A1 Constantini, Shlomi A1 Pediatric Colloid Cyst Study Group (PCCSG), K1 colloid cyst K1 endoscopy K1 hydrocephalus K1 oncology AB Colloid cysts (CCs) are rare at all ages, and particularly among children. The current literature on pediatric CC is limited, and often included in mixed adult/pediatric series. The goal of this multinational, multicenter study was to combine forces among centers and investigate the clinical course of pediatric CCs. A multinational, multicenter retrospective study was performed to attain a large sample size, focusing on CC diagnosis in patients younger than 18 years of age. Collected data included clinical presentation, radiological characteristics, treatment, and outcome. One hundred thirty-four children with CCs were included. Patient age at diagnosis ranged from 2.4 to 18 years (mean 12.8 ± 3.4 years, median 13.2 years, interquartile range 10.3-15.4 years; 22% were CCs may present in all pediatric age groups, although most that are symptomatic present after the age of 10 years. Incidentally discovered cysts should be closely followed, as many may grow, leading to hydrocephalus and other new symptoms. Presentation of CC may be acute and may cause life-threatening conditions related to hydrocephalus, necessitating urgent treatment. The outcome of treated children with CCs is favorable. YR 2022 FD 2022-02-11 LK http://hdl.handle.net/10668/20509 UL http://hdl.handle.net/10668/20509 LA en DS RISalud RD Apr 9, 2025