PEDIATRIC ALLERGY IMMUNOLOGY AND PULMONOLOGY, sa.4, ss.147-149, 2023 (SCI-Expanded)
Background: Immunoskeletal dysplasia with neurodevelopmental abnormalities (ISDNA) caused by Exostosin-Like Glycosyltransferase 3 (EXTL3) biallelic mutations is a very rare syndrome with only 16 cases reported in the literature. Skeletal dysplasia, neurodevelopmental delay, immunodeficiency, liver, and kidney cysts are the most common findings of this syndrome.Case Presentation: Here, we report on a patient who exhibited a lethal phenotype with clinical characteristics of this syndrome and had a homozygous pathogenic mutation in EXTL3 gene.Conclusions: ISDNA should be kept in mind in the differential diagnosis of patients presenting with neuro-immuno-skeletal dysplasia phenotype.