HNF1A and maturity-onset diabetes of the young: Interestingly, the patient developed hyperglycemia and was diagnosed with maturity-onset diabetes of the young (MODY) type 3 that correlated with the detection of a germline HNF1A variant (NM_000545.8 c.457C>T), previously rated as pathogenic using gene American College of Medical Genetics and Genomics (ACMG) criteria (17).