[Deforming arthropathy associated with the presence of anti Jo-1 antibody in polymyositis. A new case].

A deforming arthropathy confined to the hands developed in a woman with polymyositis of three year's duration. Roentgenograms showed distal subluxations of several fingers, especially the thumb, asymmetrical marginal erosions of the phalanges and periarticular calcifications. These roentgenographic findings are considered to be specific of polymyositis associated with anti-Jo-1 antibody.