• Tetsuya Akaishi, Kenshi Yamasaki, Yu Mori, Toshiya Takahashi, Takuya Izumiyama, Hitoshi Terui, Michiaki Abe, Shin Takayama, Setsuya Aiba, and Tadashi Ishii.
• Department of Education and Support for Regional Medicine Tohoku University Hospital Sendai Japan.
• J Gen Fam Med. 2020 Nov 1; 21 (6): 264-267.

AbstractA 66-year-old man with a 2-year history of suspected scalp eczema with excessive dandruff developed painful swollen joints in the extremities. Four months after developing polyarthritis and polydactylitis, eczema gradually spread to the face. He was referred to our hospital for intractable scalp and facial eczema and polyarthritis. Based on the appearance of the head and facial skin lesions, psoriasis was suspected. Treatment with apremilast (a phosphodiesterase-4-inhibitor) was initiated, which swiftly alleviated the skin lesions. The joint deformities persisted, but the pain in the joints disappeared. This case implies that psoriatic arthritis should be suspected even if psoriatic skin lesions are localized to the scalp.© 2020 The Authors. Journal of General and Family Medicine published by John Wiley & Sons Australia, Ltd on behalf of Japan Primary Care Association.

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