Ferritin (>336 ng/mL), female, Gottron papules, mechanic’s hands, heliotrope rash, V sign, shawl sign, skin ulceration, periungual erythema, muscle weakness, arthritis, CK (>200 U/L), CRP (>8 mg/L), ESR (>21 mm/h), age. This evidence concerns the gene CRP and arthritic joint disease.