TNF and psoriasis: Despite their distinct clinical manifestations and immunological profiles, IL-6, IL-8 and Tumor Necrosis Factor-α (TNF-α) are elevated in both atopic dermatitis and psoriasis, as confirmed in tape strips from pediatric atopic dermatitis patients [63], TNF-α levels in stratum corneum extracts from psoriasis patients and cytokine analyses in epidermis and dermis [64].