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Background: Premature infants with intrauterine growth restriction (IUGR) are predisposed to stress related hyper Insulinemic hypoglycemia (HIH). These babies are at risk for other prematurity related complications including direct hyperbilirubinemia. However, association of HIH with this has not been described, and transient cholestasis in HIH infants has not been reported. We present 4 such infants with perinatal stress related HIH who had cholestasis that resolved with time. Case series: In our retrospective review of these preemies with IUGR who had developed HIH, we found that 4 infants developed direct hyperbilirubinemia. Their gestational ages at birth ranged between 26 to 27 weeks, with birth weights between 527 to 642 grams. These infants had received total parenteral nutrition (TPN) for durations ranging between 12 to 19 days of life (DOL). HIH was established in them at variable ages between 55 to 75 DOL, based on an exaggerated glycemic response to glucagon. Of these, 1 baby was not started on Diazoxide due to underlying fluid overload. His HIH resolved by DOL 182. Two babies responded to therapy and while one remained on this till its resolution at 9 months age, another had the Diazoxide discontinued due to acute respiratory worsening leading to readmission. HIH in the latter resolved by 109 DOL. Fasting The last baby developed fluid overload early in therapy leading to its discontinuation without establishing response. Hypoglycemia in these infants resolved by ages between 4 to 9 months of life. Interestingly direct hyperbilirubinemia was noted by age 16 to 59 DOL. In all infants, the diagnosis of HIH was established after the onset of cholestasis. Extensive work up for hyperbilirubinemia ruled out any organic pathology. This transient cholestasis was noted to have resolved by ages 80 to 115 DOL. Conclusion: It appears from our experience in these premature infants, cholestasis may be associated with HIH. Its diagnosis preceded the establishment of HIH. We noted that HIH diagnosis was delayed by around 30 days after the onset of intermittent hypoglycemia. Both the cholestasis and HIH were transient. Whether the cholestasis may prognosticate the development of HIH or is indicative of transient HIH needs to be investigated. Any association between the two needs to be studied to address a common causality. IUGR babies with conjugated hyperbilirubinemia develop a mild and transient HI state which is self-resolving. Due to transient nature of this HIH in these IUGR babies with cholestasis, a genetic work up for HIH may be deferred.

A Case Series of Four Preterm Intrauterine Growth Restricted Babies With Transient Hyper-Insulinemic Hypoglycemia and Cholestasis