Glycogen storage disease due to glycogen synthase deficiency

Glycogen storage disease due to glycogen synthase deficiency, also known as glycogen storage disease type 0 (GSD 0), is a rare inherited metabolic disorder that affects how the body stores sugar. Normally, after eating, the body converts excess glucose (sugar) into glycogen, a stored form of energy kept mainly in the liver and muscles. In this condition, the enzyme called glycogen synthase does not work properly, so the body cannot make and store glycogen as it should. There are two main forms: GSD 0a affects the liver, and GSD 0b affects the muscles. In the liver form (GSD 0a), which is more commonly recognized, children typically experience episodes of low blood sugar (hypoglycemia) after fasting, such as overnight or between meals. After eating, blood sugar may rise too high because the body cannot store the glucose properly. Symptoms often include fatigue, irritability, shakiness, and sometimes seizures related to low blood sugar. Some children may also have elevated ketone levels in their blood and urine during fasting. The muscle form (GSD 0b) can cause exercise intolerance, muscle pain, and sometimes fainting during physical activity. Treatment focuses on preventing low blood sugar episodes through careful dietary management. This typically involves frequent meals, snacks rich in complex carbohydrates, and sometimes uncooked cornstarch before bedtime to provide a slow release of glucose overnight. With proper dietary management, many patients can lead relatively normal lives. There is currently no cure for this condition, and lifelong dietary vigilance is required.

Bring these to your next appointment

• Q1.How often should my child's blood sugar be monitored at home?,What is the best dietary plan to prevent low blood sugar episodes, including overnight?,What should I do if my child cannot eat during an illness?,Are there emergency medications or supplies I should keep at home?,How will this condition affect my child's growth and development?,Should my child wear a medical alert bracelet?,What school accommodations should I request for my child?

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