disorder of glycogen metabolism glycogen storage disease IX https://github.com/monarch-initiative/mondo/issues/8968 Orphanet:370 NCIT:C122662 glycogen storage disease IX GSDIX UMLS:C0268147 MEDGEN:468559 glycogenosis due to phosphorylase kinase deficiency glycogen storage disease type IX GARD:0027381 glycogen storage disease 9 MESH:C580130 DOID:0050594 A group of inborn errors of glycogen metabolism that is clinically and genetically heterogeneous. This group comprises GSD due to liver phosphorylase kinase (PhK) deficiency, GSD due to muscle PhK deficiency and GSD due to liver and muscle PhK deficiency. GSD IX GSD type 9 phosphorylase kinase deficiency GSD9 MONDO:0700291 SCTID:235908005 glycogen storage disease type 9 glycogenosis type IX glycogenosis type 9 GSD type IX