Syndromic X-Linked Intellectual Disability Hedera Type, also known as mental retardation, x-linked, syndromic, hedera type, is related to intellectual developmental disorder, x-linked, syndromic, hedera type and epilepsy, rolandic, with paroxysmal exercise-induced dystonia and writer's cramp, and has symptoms including drop attack An important gene associated with Syndromic X-Linked Intellectual Disability Hedera Type is ATP6AP2 (ATPase H+ Transporting Accessory Protein 2), and among its related pathways/superpathways are Signaling by Receptor Tyrosine Kinases and Insulin receptor signalling cascade.