HNF1B mutation in a Turkish child with renal and exocrine pancreas insufficiency, diabetes and liver disease

Gonc EN, Ozturk BB, Haldorsen IS, Molnes J, Immervoll H, Ræder H, Molven A, Søvik O, Njølstad PR. HNF1B mutation in a Turkish child with renal and exocrine pancreas insufficiency, diabetes and liver disease. A small-for-gestational age female infant presented with bilateral hypoplastic kidneys at 3 months of age. She developed chronic renal insufficiency. Insulin-requiring, non-autoimmune diabetes was documented at 6 years of age. She had mild steatosis and iron deposition in the liver, and mal-development of pancreas. Genetic studies revealed a heterozygous mutation (S148L) of the HNF1B gene, compatible with an HNF1B-MODY phenotype (MODY5). This is the first case of HNF1B-MODY reported from Turkey and represents a particularly severe phenotype of the disease.