{Reference Type}: Case Reports {Title}: Novel c.1505_1509dupCTGCC pathogenic variation in a male case with Christianson syndrome. {Author}: Yalcintepe S;Gurkan H; {Journal}: Clin Dysmorphol {Volume}: 30 {Issue}: 1 {Year}: Jan 2021 {Factor}: 0.884 {DOI}: 10.1097/MCD.0000000000000358 {Abstract}: Pathogenic variations in the SLC9A6 gene are associated with an X-linked disorder Christianson syndrome characterized by developmental delay, microcephaly, intellectual disability, autistic-like behavior and epilepsy. We identified a novel pathogenic variation in the SLC9A6 gene in a boy with developmental delay and microcephaly. Herein we report the clinical findings of the case diagnosed as Christianson syndrome; his mother was found to carry the same variant.