Our findings align with those of a study of 224 MODY patients in Turkey, where mutations were identified in the following proportions: 65% in the GCK gene, 19% in HNF1A, 3.6% in HNF4A, 3.6% in KLF11, and 3.1% in HNF1B. The gene discussed is HNF4A; the disease is MODY.