<unk>  (GSD<unk> , or Anderson's Disease, is a form of glycogen storage disease, which is caused by an inborn error of metabolism. It is the result of a mutation in the GBE1 gene, which causes a defect in the glycogen branching enzyme. Therefore, glycogen is not made properly and abnormal glycogen molecules accumulate in cells; most severely in cardiac and muscle cells. The severity of this disease varies on the amount of enzyme produced. GSD<unk>  is autosomal recessive, which means each parent has a mutant copy of the gene, but show no symptoms of the disease. It affects 1 in 800,000 individuals worldwide, with 3% of all GSDs being type<unk> . The disease was described and studied first by Dorothy Hansine Andersen.
Glycogen storage disease type IV
Glycogen storage disease type III
Glycogen storage disease type 0
Glycogen storage disease type II
Glycogen storage disease type V
Glycogen storage disease type VI
Glycogen storage disease type IX
Essential fructosuria