The level of AANAT expression in the control group was 1.32 ± 0.46, whereas in the UC group it reached 1.68 ± 0.54 (p < 0.01), and in the LC group, it was 2.29 ± 0.69 (p < 0.001). This evidence concerns the gene AANAT and laryngotracheoesophageal cleft.