The aim of the present study was to analyze the clinical features and genetic findings of patients with Neurofibromatosis Type 1 caused by mutations in the NF1 gene, who were inpatients and/or outpatients in the Heim Pal National Pediatric Institute, Budapest, Hungary between 1 January 2010 and 30 October 2024. This evidence concerns the gene NF1 and neurofibromatosis type 1.