Intellectual Developmental Disorder with Dysmorphic Facies, Seizures, and Distal Limb Anomalies, is also known as iddfsda. An important gene associated with Intellectual Developmental Disorder with Dysmorphic Facies, Seizures, and Distal Limb Anomalies is OTUD6B (OTU Deubiquitinase 6B). Affiliated tissues include heart and brain, and related phenotypes are seizure and intellectual disability, severe