RT Journal Article SR Electronic T1 Plasma C peptide in hyperinsulinaemic hypoglycaemia. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 1096 OP 1098 DO 10.1136/adc.59.11.1096 VO 59 IS 11 A1 Bommen, M A1 Stanhope, R A1 Kurtz, A B A1 Brook, C G YR 1984 UL http://adc.bmj.com/content/59/11/1096.abstract AB We describe two children with hypoglycaemia due to pancreatic beta cell hyperactivity. Both had low serum insulin but raised plasma C peptide concentrations when hypoglycaemic. Measurement of C peptide is valuable in the diagnosis of hyperinsulinaemic hypoglycaemia in children.