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A 70-year-old Japanese man with a 10-year history of psoriasis vulgaris was treated with topical steroids and vitamin D3. In 3 days, general malaise and persistent fever developed. He had no contact with sick persons, trauma, new medication or overseas travel history. His scalp and extremities showed erythema with scales, without itching, indicating psoriatic erythroderma. His palms and soles had non-tender bluish-red spots (figures 1 and …
Contributors MY and RI contributed to patient management, and to writing the manuscript.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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