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Transient Neonatal Diabetes Mellitus followed by recurrent asymptomatic hypoglycaemia: a case report
Archana Priyadarshi1, Charles F Verge2,3, Leah Vandervliet4
1Royal Hospital for Women, Randwick, Sydney, Australia. archanapriyadarshi@yahoo.co.in.
Insights
Transient neonatal diabetes mellitus (TNDM) can recur as asymptomatic hypoglycemia weeks after remission. Close monitoring and aggressive feeding are crucial for managing TNDM infants.
Area of Science:
- Neonatology
- Endocrinology
- Genetics
Background:
- Transient neonatal diabetes mellitus (TNDM) is the most common cause of diabetes in newborns.
- Often linked to genetic aberrations at the 6q24 gene locus, TNDM typically resolves by three months but increases future type 2 diabetes risk.
- The disorder presents in three phases: neonatal diabetes, apparent remission, and potential relapse.
Observation:
- A neonate with low birth weight and growth retardation presented with transient diabetes mellitus at birth.
- Recurrent asymptomatic hypoglycemia was detected at six weeks of age, four weeks after diabetes remission, via pre-feed blood glucose monitoring.
- No other congenital malformations were observed in the infant.
Findings:
- Neonates in remission from TNDM can experience recurrent asymptomatic hypoglycemia.
- This hypoglycemia can persist for weeks and may be missed without routine pre-feed blood glucose monitoring.
- Aggressive enteral feeding with high glucose delivery rates may be necessary to maintain normoglycemia.
Implications:
- Highlights the importance of continued vigilance and monitoring in infants with TNDM even after apparent remission.
- Suggests a potential need for adjusted feeding strategies in infants recovering from TNDM to prevent hypoglycemia.
- Underscores the value of pre-feed blood glucose monitoring in detecting subclinical metabolic disturbances in this population.
Background:
Transient Neonatal Diabetes Mellitus is the commonest cause of diabetes presenting in the first week of life. Majority of infants recover by 3 months of age but are predisposed to developing type 2 diabetes later on in life. This condition is usually due to genetic aberrations at the 6q24 gene locus, and can be sporadic or inherited. This disorder has three phases: neonatal diabetes, apparent remission, relapse of diabetes.
Case Presentation:
Our case, a neonate presented with low birth weight and growth retardation along with the metabolic profile consistent with transient diabetes mellitus at birth. We report a novel clinical observation of recurrent asymptomatic hypoglycaemia detected on pre-feed blood glucose level monitoring in our case with transient neonatal diabetes mellitus at 6 weeks of age, 4 weeks after the remission of diabetes mellitus.
Conclusion:
This case demonstrates that neonates in remission following transient diabetes mellitus can present with recurrent asymptomatic hypoglycaemia without any other obvious congenital malformations seen. This asymptomatic hypoglycaemia may persist for weeks and may be missed if pre-feed blood glucose level monitoring is not done in these infants. Also, these infants may require an aggressive enteral feeding regimen with high glucose delivery rate to maintain normoglycemia.
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