Menke-Hennekam Syndrome 1, also known as mkhk1, is related to menke-hennekam syndrome 2 and hennekam lymphangiectasia-lymphedema syndrome 1. An important gene associated with Menke-Hennekam Syndrome 1 is CREBBP (CREB Binding Protein). Affiliated tissues include eye and lung, and related phenotypes are intellectual disability and feeding difficulties