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Post-Prandial Hyperinsulinaemic Hypoglycaemia after Oesophageal Surgery in Children

Introduction: Post-prandial hyperinsulinaemic hypoglycaemia (PPHH) is a recognized complication of various gastric surgeries in children, but rarely reported after oesophageal atresia repair. We report 2 children diagnosed with PPHH after oesophageal surgery and the challenges of their management. Case 1: A 2-year-old boy diagnosed with oesophageal atresia at birth was surgically repaired requiring 6 oesophageal dilatations in the first year of life. At 11 months of age, he manifested hypoglycaemic seizures and investigations confirmed PPHH. Acarbose and diazoxide trials failed. He was managed with 17-h continuous gastrostomy feeds. Currently, he is 28 months old with euglycaemia on daytime bolus gastrostomy feeds and overnight 12-h continuous gastrostomy feeds. Case 2: A 6-month-old girl diagnosed with Wolf-Hirschhorn syndrome and tracheo-oesophageal fistula was surgically repaired, requiring monthly oesophageal dilatations. At 5 months of age, she was reported to have hypoglycaemia and PPHH was confirmed. She responded to diazoxide and continuous nasogastric tube feeds, but developed pulmonary hypertension possibly diazoxide-induced. Subsequently, diazoxide was stopped and normoglycaemia was secured via 20-h continuous gastrostomy feeds. Conclusion: PPHH may be an underdiagnosed complication in children undergoing surgery for oesophageal atresia. These children must be monitored closely for symptoms of hypoglycaemia and if there are concerns must be screened for possible PPHH. Our cases demonstrate that continuous feeding regimens might be the only therapeutic option, until PPHH gradually lessens in intensity over time.