Open AccessCongenital hyperinsulinism with hyperammonaemia
Author(s) -
Alex Pschibul,
Jörg Müller,
Hubert Fahnenstich
Publication year - 2010
Publication title -
bmj case reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.231
H-Index - 26
ISSN - 1757-790X
DOI - 10.1136/bcr.08.2009.2174
Subject(s) - diazoxide , medicine , hyperinsulinism , congenital hyperinsulinism , hyperinsulinemic hypoglycemia , hypoglycemia , pediatrics , differential diagnosis , endocrinology , pathology , insulin , insulin resistance
Congenital hyperinsulinism is considered to be the most frequent cause of persistent recurrent hypoglycaemia in infants. The clinical presentation and response to pharmacological treatment may vary significantly depending on the underlying pathology. We report a case of a female infant with mild but early onset of recurrent hypoglycaemia. Metabolic workup revealed hyperinsulinism combined with mild hyperammonaemia as well as elevation of α-ketoglutarate in urine. Genetic testing demonstrated a de novo mutation in exon 7 of the glutamate dehydrogenase gene on chromosome 10. Episodes of hypoglycaemia responded to treatment with diazoxide. The differential diagnosis, pathophysiology and treatment of congenital hyperinsulinism is discussed.