A 20-year-old man presented for evaluation of a 1-month history of skin induration involving both forearms, preceded by hand stiffness of 2 months’ duration. Rheumatoid arthritis was initially suspected, and he was referred to our hospital for treatment. His medical and family histories were noncontributory. On physical examination, the skin of the forearms was indurated, was noncompressible, and could not be pinched together. He had a prominent groove sign, with a linear depression overlying his forearm veins on raising his arm to the level of the heart (Figure).
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Yano H, Kinjo M. Eosinophilic Fasciitis. JAMA Dermatol. 2020;156(5):582. doi:10.1001/jamadermatol.2020.0665
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