This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
TANGO2-related metabolic encephalopathy and arrhythmias is a disease that can cause episodes of metabolic crises and abnormal heart rhythms (arrhythmia). A metabolic crisis is caused by having low blood sugar (hypoglycemia) and the buildup of toxic products in the blood. A metabolic crisis can occur in any person with a metabolic disorder, and they are more likely to occur after a person has gone long periods without eating or during an illness. Most people with TANGO2-related metabolic encephalopathy and arrhythmias present with symptoms of a breakdown of muscle tissue (rhabdomyolysis). This can cause kidney damage and symptoms include fatigue, muscle weakness, and having a dark color of the urine. Other symptoms of TANGO2-related metabolic encephalopathy and arrhythmias include developmental delay, intellectual disability, seizures, hearing loss, low thyroid function (hypothyroidism) and trouble coordinating movements (ataxia). Signs and symptoms of the disease are most likely to first occur during infancy or early childhood. The disease is most common in people who are of Caucasian or Hispanic/Latino descent.
TANGO2-related metabolic encephalopathy and arrhythmias is caused by a genetic change (mutation or pathogenic variant) in the TANGO2 gene. The disease is inherited in an autosomal recessive manner. The disease may be suspected in people who have a metabolic crisis, episodes of rhabdomyolysis, and arrhythmias. The diagnosis can be confirmed with genetic testing. Treatment of the disease is focused on avoiding metabolic crisis by avoiding fasting or illness. If a metabolic crisis does occur, it is important to have a plan in place so that proper treatment can occur. Other symptoms of the disease may be managed with therapies and medications.
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