Seronegative Oligoarthritis Preceding Psoriasis by 9.5 Years

Junpei Tsuchiya, Naoki Kondo, Atsushi Fujimoto, Rie Kondo, Masahiko Yamada, Tatsuya Kuraishi, Takuya Yoda, Riichiro Abe, Naoto Endo
Acta Medica Okayama 2020, 74 (5): 449-453
We report a case of psoriatic arthritis where oligoarthritis preceded the skin lesions. A 57-year-old man complained of left third-finger pain. Laboratory examinations were negative for anti-cyclic citrullinated peptide antibodies and rheumatoid factor; he was treated for suspected rheumatoid arthritis. Six years later, X-ray revealed enthesitis of his fingers and wrist joint. At 9.5 years after the initial visit, skin lesions appeared in the left auricular region and buttock and dermatopathology findings indicated psoriasis vulgaris. The final diagnosis was psoriatic arthritis. In cases of seronegative oligoarthritis, psoriatic arthritis must be considered because some patients demonstrate osteoarticular lesions preceding skin lesions.

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