MONDO_0009292 (glycogen storage disease due to glycogen branching enzyme deficiency) is glycogen branching enzyme (GBE) deficiency (Andersen's disease or amylopectinosis), or glycogen storage disease type 4 (GSD4), is a rare and severe form of glycogen storage disease which accounts for approximately 3% of all the glycogen storage diseases. Also known as: Andersen Disease (GSD IV), Andersen disease, Andersen's disease, GBE1 glycogen storage disease, GSD due to glycogen branching enzyme deficiency, GSD type 4, GSD type IV, amylopectinosis.