Diagnostic challenges in pediatric-onset multiple sclerosis: a case report - Kalnina, Marija Luize; Pretkalnina, Dace; Cehovica, Marija; Smite-Laguna, Arta; Rozentale, Jolanta; Flintere-Flinte, Alina; Kalnina, Elina (Pediatric Medicine; Vol 8 (November 30, 2025): Pediatric Medicine, 2025)