TNF and psoriasis: Inflammatory diseases that share comorbidities with inflammatory arthritis, such as psoriasis, reefer NAFLD as a hepatic manifestation of MetS, and although its etiology is not entirely clear it has been postulated that inflammatory cytokines such as tumor necrosis factor-alpha (TNF-α), IL-6, IL1-β and resistin play a key role in the development of fatty liver disease (45).