| | | Episodes of low blood sugar levels (hypoglycemia) during fasting if the liver is affected |
GSD I (von Gierke disease) | | |
| | | Enlarged liver and kidney, slowed growth, very low blood sugar levels, and abnormally high levels of acid, fats, and uric acid in blood |
| | Liver and white blood cells | Same as in von Gierke disease Low white blood cell count, recurring infections, and inflammatory bowel disease |
| | | Enlarged liver and heart and muscle weakness |
GSD III (Cori disease, Forbes disease) | | Enlarged liver or cirrhosis, low blood sugar levels, muscle damage, heart damage, and weak bones in some people |
GSD IV (Andersen disease) | Liver, muscle, and most tissues | Cirrhosis, muscle damage, and delayed growth and development |
| | | Muscle cramps or weakness during physical activity |
| | | Episodes of low blood sugar during fasting |
| | Skeletal muscle and red blood cells | Muscle cramps during physical activity and red blood cell destruction (hemolysis) |
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