Contributor: Gordon K. Klintworth
The glycogen storage diseases (glycogenoses) are inherited disorders of glycogen metabolism characterized by an intracytoplasmic storage of glycogen. More than 10 types are known (glycogenosis type Ia, glycogenosis type Ib, glycogenosis type Ic, glycogenosis type Id, glycogenosis type II, glycogenosis type II, glycogenosis type III, glycogenosis type IV, glycogenosis type V, glycogenosis type VI, glycogenosis type VII, glycogenosis type VIII). With the exception of glycogenosis type IIb and glycogenosis type VIII (X-linked disorders) these conditions all have an autosomal recessive mode of inheritance. Ocular abnormalities have only been recognized in glycogenosis type I and glycogenosis type II and these are mild and not well-documented.