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- W2805071282 abstract "Objective: Congenital hyperinsulinism (CHI) is the commonest cause of hyperinsulinaemic hypoglycaemia in the neonatal, infancy and childhood periods. Its clinical presentation, histology and underlying molecular biology are extremely heterogeneous. The aim of this study was to describe the clinical characteristics, analyse the genotype–phenotype correlations and describe the treatment outcome of Turkish CHI patients. Design and methods: A total of 35 patients with CHI were retrospectively recruited from four large paediatric endocrine centres in Turkey. Detailed clinical, biochemical and genotype information was collected. Results: Diazoxide unresponsiveness was observed in nearly half of the patients (nZ17; 48.5%). Among diazoxide-unresponsive patients, mutations in ABCC8/KCNJ11 were identified in 16 (94%) patients. Among diazoxide-responsive patients (nZ18), mutations were identified in two patients (11%). Genotype–phenotype correlation revealed that mutations in ABCC8/KCNJ11 were associated with an increased birth weight and early age of presentation. Five patients had p.L1171fs (c.3512del) ABCC8 mutations, suggestive of a founder effect. The rate of detection of a pathogenic mutation was higher in consanguineous families compared with non-consanguineous families (87.5 vs 21%; P!0.0001). Among the diazoxide-unresponsive group, ten patients were medically managed with octreotide therapy and carbohydraterich feeds and six patients underwent subtotal pancreatectomy. There was a high incidence of developmental delay and cerebral palsy among diazoxide-unresponsive patients. Conclusions: This is the largest study to report genotype–phenotype correlations among Turkish patients with CHI. Mutations in ABCC8 and KCNJ11 are the commonest causes of CHI in Turkish patients (48.6%). There is a higher likelihood of genetic diagnosis in patients with early age of presentation, higher birth weight and from consanguineous pedigrees." @default.
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- W2805071282 date "2014-08-28" @default.
- W2805071282 modified "2023-10-17" @default.
- W2805071282 title "Clinical Characteristics and Phenotype-Genotype Analysis in Turkish Patients with Congenital Hyperinsulinism; Predominance of Recessive KATP Channel Mutations" @default.
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