Glycogen Storage Disease Iv, also known as glycogen storage disease type iv, is related to polyglucosan body myopathy 1 with or without immunodeficiency and glycogen storage disease iii, and has symptoms including hepatosplenomegaly and muscle weakness. An important gene associated with Glycogen Storage Disease Iv is GBE1 (1,4-Alpha-Glucan Branching Enzyme 1), and among its related pathways/superpathways are Signal Transduction and Glycosaminoglycan metabolism. The drug Pharmaceutical Solutions has been mentioned in the context of this disorder. Affiliated tissues include liver and heart, and related phenotypes are hepatomegaly and generalized abnormality of skin