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Management strategy for congenital hyperinsulinism with atrial septal defect and diazoxide-induced pulmonary
Sayuri Koizumi1, Ikuma Musha1,2, Koichi Toda3
1Department of Pediatrics, Saitama Medical University Hospital, Saitama, Japan.
Insights
Congenital hyperinsulinism (CHI) treatment with diazoxide can cause pulmonary hypertension (PH). This case study shows surgically closing an atrial septal defect enabled safe diazoxide reintroduction, achieving good glycemic control and managing PH.
Area of Science:
- Pediatric Endocrinology
- Cardiology
- Medical Case Reports
Background:
- Congenital hyperinsulinism (CHI) is a condition of excessive insulin secretion causing hypoglycemia.
- Diazoxide is the primary medical treatment for CHI but can induce pulmonary hypertension (PH).
Observation:
- A 2-month-old infant with CHI and an atrial septal defect (ASD) developed dose-dependent PH while on diazoxide.
- Alternative medical management proved insufficient for stable glycemic control.
- Surgical closure of the ASD was performed to facilitate safer diazoxide use.
Findings:
- The combined approach of surgical ASD closure, diazoxide therapy, and anti-PH medication successfully managed PH.
- This strategy also achieved stable blood glucose levels in the patient.
Implications:
- This case demonstrates a novel strategy for managing CHI patients with co-existing cardiac conditions.
- Surgical intervention for cardiac defects may allow for the safe reintroduction of essential medications like diazoxide.
- This approach offers a potential alternative to more invasive treatments like pancreatic resection.
Abstract:
Congenital hyperinsulinism (CHI) is characterized by hypoglycemia caused by excessive insulin secretion. CHI is classified into two types: transient CHI, which resolves within 3-4 mo of birth, and persistent CHI, which persists beyond this period. Diazoxide, the first-line treatment for CHI, may cause pulmonary hypertension (PH) as a side effect. Here, we report the case of a 2-mo-old girl with CHI and an atrial septal defect who initially responded well to diazoxide but developed dose-dependent PH. Diazoxide was discontinued, and treatment was switched to octreotide, glycogen storage disease milk, and glucagon. However, maintaining stable blood glucose levels remained challenging. Surgical intervention is typically required when medical management is ineffective; however, such procedures are limited to specialized facilities. Additionally, pancreatic resection carries a high risk of postoperative diabetes. To enable the safe reintroduction of diazoxide, we surgically closed the atrial septal defect with a left-to-right shunt and combined diazoxide therapy with anti-PH medication. This approach successfully controlled PH and achieved good glycemic control.
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