Psoriatic arthritis (PsA) is a psoriasis-associated inflammatory arthritis that is usually seronegative for rheumatoid factor. In Japan, the prevalence of PsA in general population ranges from 0.02 to 0.04%. We report two cases of PsA who under went total hip arthroplasty of both hips. It is a known fact that, patients with PsA have higher infection rates after total arthroplasty. Precautions are thus required in the preoperative as well as postoperative periodto prevent joint sepsis. In particular, the use of a topical corticosteroid or other dermatologic treatment should be considered for skin protection in total joint arthroplasty.
