Glycogen Storage Disease Viii, also known as glycogen storage disease type viii, is related to glycogen storage disease ixa1 and phosphorylase kinase deficiency. An important gene associated with Glycogen Storage Disease Viii is PHKA2 (Phosphorylase Kinase Regulatory Subunit Alpha 2), and among its related pathways/superpathways are Glycosaminoglycan metabolism and Digestion and absorption. Affiliated tissues include liver and skeletal muscle.