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The article describes proximal patellar enthesitis treatment with ustekinumab in a 29-year-old man with psoriatic arthritis. Highlights include acute and remittent pain presented by the patient in 2016 at the right proximal patellar insertion, the patient's Psoriasis Area Severity Index score, and reduction of pain and decreased induration and desquamation of psoriatic plaques registered at week four.

Vasculitis is a heterogeneous group of disorders characterized by the presence of necrotic inflammatory phenomena and destruction of blood vessels. Vasculitis is classified as primary (idiopathic) or secondary to infections, connective tissue diseases and drugs but can also be considered as a paraneoplastic phenomenon. Evidence shows that the increasing use of biological agents results in a growing number of reports of autoimmune diseases induced by these therapies. An inflammatory articular chronic disease such as rheumatoid arthritis may be complicated by extra-articular manifestations, such as cutaneous or systemic vasculitis. Herewith, we describe the case of a great vessels arteritis in a patient affected by rheumatoid arthritis in therapy with an anti-TNF agent (etanercept). [ABSTRACT FROM AUTHOR]