Idiopathic Circumscripta Calcinosis Cutis of the Knee

BACKGROUND Calcinosis cutis, a disease characterized by the presence of calcium deposits in the skin, is classified into four types according to etiology: dystrophic, metastatic, iatrogenic and idiopathic. The dystrophic form is the most common while the idiopathic one is the rarest, but specific incidence and frequency data are not available in scientific literature. OBJECTIVE Calcinosis cutis circumscripta is a very rare form of idiopathic...