Description : Glycogen storage disease IXc is characterized by onset in childhood of hepatomegaly,
hypotonia, growth retardation in childhood, and liver dysfunction. These symptoms
improve with age in most cases; however, some patients may develop hepatic fibrosis
or cirrhosis (Burwinkel et al., 1998).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the testis/liver gamma-2 subunit of phosphorylase kinase gene
(PHKG2, 172471.0001);
Laboratory abnormalities : Fasting hypoglycemia; Lactic acidosis; Fasting ketosis; Abnormal liver enzymes; Increased serum triglycerides; Moderately decreased to normal PHK activity in skeletal muscle; Decreased PHK activity in liver;