Although these pathological conditions have common inflammatory pathways, such as TNF-α, INF-γ, IL-6, and although treatments used for PsO and PsA, such as methotrexate and cyclosporine, may induce bone rarefaction, studies on this subject are contradictory, and screening and management of osteoporosis in the psoriatic patient are still under debate [53]. Here, TNF is linked to osteoporosis.