Abstract
Hyperinsulinism (HI) is the leading cause of persistent hypoglycemia in infants. Prompt recognition and treatment, independent of whether infants have transient or permanent HI, are essential to decrease risk of neurologic damage. The most common form of congenital HI is due to inactivating mutations of the β-cell ATP-sensitive potassium (KATP) channel (KATP-HI) and is typically diazoxide unresponsive. KATP-HI occurs in diffuse and focal forms. Distinguishing between the 2 forms is crucial, because pancreatectomy is curative in the focal form but palliative in the diffuse form. The 18-fluoro-L-3,4-dihydroxyphenylalanine PET scan has revolutionized HI management by allowing accurate localization of focal lesions prior to surgery.
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