Any multiple congenital anomalies/dysmorphic syndrome-intellectual disability in which the cause of the disease is a mutation in the PIGN gene. The disease is Monarch Disease Ontology identifier MONDO_0013563 (multiple congenital anomalies-hypotonia-seizures syndrome 1). Also known as: PIGN multiple congenital anomalies/dysmorphic syndrome-intellectual disability, PIGN-CDG, congenital disorder of glycosylation due to PIGN deficiency, inherited GPI anchor-deficiency, multiple congenital anomalies-hypotonia-seizures syndrome type 1, multiple congenital anomalies/dysmorphic syndrome-intellectual disability caused by mutation in PIGN.