Background: BCL11B variants are associated with intellectual developmental disorder with dysmorphic facies, speech delay, and T-cell abnormalities (IDDSFTA) (OMIN 618092). The clinical features include neurodevelopmental disorders (psychomotor delay, intellectual disability, language delay, autism spectrum features), facial dysmorphisms, immunological manifestations (asthma, allergies and T cells decrease). The aim is to present a IDDSFTA case in Mexican population with a probably pathogenic variant that has not been reported before and to compare it with literature cases.
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