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Hypoglycemia in patients with congenital muscle disease
Leslie H Hayes1,2, Pomi Yun1, Payam Mohassel1
1Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Building 10, Room 2B 39, MSC 1477, 10 Center Drive, Bethesda, MD, 20892, USA.
Insights
Children with congenital muscle disease (CMD) may experience hypoglycemia, particularly during illness or stress. Early recognition and treatment are crucial due to low muscle mass impacting glucose regulation.
Area of Science:
- Pediatric Endocrinology
- Neuromuscular Disorders
- Metabolic Diseases
Background:
- Limited research exists on hypoglycemia in children with congenital muscle disease (CMD).
- Previous studies focused on hypoglycemia in broader neuromuscular disease categories, not specifically CMD.
- This study addresses the gap in understanding hypoglycemia occurrence in pediatric CMD patients.
Purpose of the Study:
- To investigate the incidence and characteristics of hypoglycemia in children diagnosed with congenital muscle disease (CMD).
- To identify clinical and biochemical features associated with hypoglycemic episodes in this population.
- To raise awareness among clinicians and caregivers regarding the risk of hypoglycemia in pediatric CMD.
Main Methods:
- Retrospective review of pediatric patients within the CMD International Registry (CMDIR).
- Inclusion criteria: patients with a documented history of hypoglycemia.
- Characterization of hypoglycemic episodes, clinical presentation, and biochemical data.
Main Results:
- Ten patients with CMD experienced at least one hypoglycemic episode, with onset around 3.5 years of age.
- Five patients had LAMA2-related muscular dystrophy.
- Common symptoms included altered mental status, nausea, and vomiting; laboratory findings indicated ketotic hypoglycemia (metabolic acidosis, ketonuria).
Conclusions:
- Children with CMD are at an increased risk for hypoglycemia, especially during periods of fasting, illness, or stress.
- Reduced muscle mass in CMD patients may impair gluconeogenic substrate availability.
- Clinicians and caregivers require heightened awareness and training for recognizing and managing hypoglycemia in this vulnerable group.
Background:
Only a few small studies have previously reported episodes of hypoglycemia in children with neuromuscular diseases; however, there has been no broader investigation into the occurrence of hypoglycemia in children with congenital muscle disease (CMD).
Methods:
Pediatric patients enrolled in the CMD International Registry (CMDIR) with a history of hypoglycemia were included in this retrospective review. Hypoglycemic episodes and associated clinical and biochemical characteristics were characterized.
Results:
Ten patients with CMD (5 with LAMA2-related muscular dystrophy) reported at least one episode of hypoglycemia beginning at an average age of 3.5 years. Predominant symptoms included altered mental status and nausea/vomiting, and laboratory studies demonstrated metabolic acidosis and ketonuria, consistent with ketotic hypoglycemia.
Conclusion:
Patients with CMD may have an increased risk of hypoglycemia during fasting, illness, or stress due to their relatively low muscle mass and hence, paucity of gluconeogenic substrate. Clinicians should therefore maintain a high index of suspicion for hypoglycemia in this high-risk patient population and caregivers should routinely be trained to recognize and treat hypoglycemia.
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