glycine encephalopathy fatal multiple mitochondrial dysfunctions syndrome multiple mitochondrial dysfunctions syndrome 7 https://github.com/monarch-initiative/mondo/issues/9896 https://www.malacards.org/card/multiple_mitochondrial_dysfunctions_syndrome_7 UMLS:C5830586 MONDO:0957382 MEDGEN:1841222 GCSH-related glycine encephalopathy OMIM:620423 GARD:0026818 Any multiple mitochondrial dysfunctions syndrome in which the cause of the disease is a mutation in the GCSH gene. It is characterized by a clinical spectrum ranging from neonatal fatal glycine encephalopathy to an attenuated phenotype of developmental delay, behavioral problems, limited epilepsy, and variable movement problems.