Congenital hyperinsulinaemic hypoglycaemia is the most common cause of hyperinsulinism in early infancy. By providing genetic testing for individuals diagnosed with this condition our research aims to provide novel insights into mechanisms of insulin secretion

Since the first referral in 2003 the molecular genetics laboratory in Exeter has provided testing for over 2350 individuals diagnosed with congenital hyperinsulinism from  78 different countries around the world. This work has provided an accurate genetic diagnosis for over 45% of these individuals and their family members.

HI World Map OCT 2017

Worldwide referrals to the Exeter Genetics Laboratory aims to provide information for patients and professionals on the underlying genetic mechanisms of congenital hyperinsulinism. This website is run by the Hyperinsulinism Research department and the Centre for Molecular Genetics at the University of Exeter Medical School and Royal Devon and Exeter Hospital, Exeter, UK.


‘Thank you for your performing the genetic testing and replying so quickly.  I am grateful for your help in improving patient’s care. Our patient is being followed for HI since birth and these results will be very useful to us in the future’ Clinician, Algeria

‘We would like to express our heart-felt thanks to you for doing mutation studies for our patients under your research project’ Clinician, India

‘Congratulations for the great work you have done to diagnose these families. All of us (families and doctors) are very grateful for it’ – Clinician, Spain

‘Thank you so much for your great support and for sending us the results of our patients’ – Clinician, Vietnam 

‘I want to thank your valuable help, for conducting the test for our patient. Thanks to your support to let us have a better approach of the case, now we have the diagnosis’ – Clinician, Guatemala

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