U2AF2 variant in a patient with developmental delay, dysmorphic features, and epilepsy.

Variants in the RNA binding protein (RBP) U2AF2 are hypothesized to cause a novel neurodevelopmental disorder. Here, we report a patient with a de novo missense variant in U2AF2, the second case report of the same variant, and third case report overall. The patient in this report has a history of global developmental delay, dysmorphic features, and epilepsy. This presentation is consistent with the previous case report with the same U2AF2 variant and with a recent case report of another U2AF2 variant, strengthening the evidence that variants in U2AF2 are the cause of a novel neurodevelopmental disorder.