Moreover, mutations in the KRT1 [32] and KRT10 [33] genes led to the development of congenital ichthyosiform erythroderma (CIE); mutations in the KRT2 gene [34]—superficial epidermolytic ichthyosis (SEI); mutations in the KRT6A, KRT6B, KRT16, and KRT17 genes—pachyonychia congenita; mutations in the UROD and UROS genes—porphyria cutanea and porphyria erythropoietic; mutations in the SLC39A4 gene—acrodermatitis enteropathica. This evidence concerns the gene UROD and superficial epidermolytic ichthyosis.