Glycogen storage disease type 6 (Hers disease) is an autosomal recessive disease predominantly affecting liver function. Mutations on the liver isoform of the glycogen phosphorylase gene, PYGL, create defects that cause a buildup of glycogen in the liver. Most cases will present by early childhood. Common findings include hepatomegaly and growth retardation. Abnormal laboratory findings include hypoglycemia, lactic acidosis, and hyperlipidemia. A special diet can be prescribed to maintain regular glucose levels.
ICD10CM: E74.09 – Other glycogen storage disease
SNOMEDCT: 29291001 – Glycogen storage disease, type VI
Differential Diagnosis & Pitfalls
Other glycogen storage disease types (eg, types 1, 3, 9)