IchthyosisHypotrichosisIchthyosiform Erythroderma, CongenitalIchthyosis, LamellarXeroderma PigmentosumGenes, RecessiveIchthyosis VulgarisIchthyosis, X-LinkedConsanguinityXeroderma Pigmentosum Group A ProteinSteryl-SulfatasePedigreeHyperkeratosis, EpidermolyticMutationXeroderma Pigmentosum Group D ProteinUltraviolet RaysHomozygoteDNA RepairArylsulfatasesKeratolytic Agents