Temporomandibular Joint Involvement Revealing Psoriatic Arthritis: A Case Report.

Temporomandibular joint (TMJ) involvement in psoriatic arthritis (PsA) is infrequent but can lead to significant pain and challenges in effective mouth opening or closing. In this report, we present a clinical case of a patient with TMJ involvement revealing PsA.  The patient is a 35-year-old male with a history of guttate psoriasis, who presented with several weeks of TMJ pain and decreased mouth opening, followed by inflammatory lumbar, buttock pain and oligoarthritis. The diagnosis of PsA with TMJ involvement was established based on clinical manifestations per the ClASsification criteria for Psoriatic ARthritis (CASPAR) criteria. Full remission was achieved with tumor necrosis factor alpha inhibitors. Frequently overlooked or untreated, delayed diagnosis contributes to extensive deterioration of TMJ structures, resulting in persistent discomfort and a detrimental impact on the patient's quality of life. Therefore, prompt initiation of appropriate treatment is crucial to enhance patient well-being.