A novel mutation associated with congenital hyperinsulinism

Area of Science:

• Medical Genetics
• Neonatology
• Endocrinology

Background:

• Congenital hyperinsulinism (CHI) is a significant cause of persistent hypoglycemia in newborns.
• Early diagnosis and management are crucial for preventing neurological complications.

Observation:

• A term, large-for-gestation neonate presented with persistent hypoglycemia.
• Genetic testing revealed a novel sporadic missense mutation in the ABCC8 gene.
• The patient exhibited ventricular hypertrophy that spontaneously regressed.

Findings:

• The novel ABCC8 mutation was associated with early-onset persistent hypoglycemia.
• The infant's condition responded to diazoxide and octreotide treatment.
• The identified mutation has not been previously reported in association with CHI.

Implications:

• This case underscores the necessity of genetic evaluation in diagnosing congenital hyperinsulinism.
• Discovering new mutations with distinct phenotypes can enhance diagnostic and prognostic capabilities.
• Further research into novel ABCC8 mutations may reveal new therapeutic targets.