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A genetically inherited anomaly of glycogen metabolism and a form of glycogen storage disease characterised by fasting hypoglycaemia. It is an extremely rare disease; about 20 cases have been reported in the literature so far. The disease appears in infancy or in early childhood. Patients present with morning fatigue and fasting hypoglycaemia (without hepatomegaly) associated with hyperketonaemia but without hyperalaninaemia or hyperlactacidaemia. After meals, major hyperglycaemia associated with lactate and alanine increase and hyperlipidaemia is observed. Caused by mutations in the GYS2 gene (12p12.2). Transmission is autosomal recessive.
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A genetically inherited anomaly of glycogen metabolism and a form of glycogen storage disease characterized by fasting hypoglycemia. It is an extremely rare disease; about 20 cases have been reported in the literature so far. The disease appears in infancy or in early childhood. Patients present with morning fatigue and fasting hypoglycemia (without hepatomegaly) associated with hyperketonemia but without hyperalaninemia or hyperlactacidemia. After meals, major hyperglycemia associated with lactate and alanine increase and hyperlipidemia is observed. Caused by mutations in the GYS2 gene (12p12.2). Transmission is autosomal recessive.
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