Calcinosis Cutis and Osteoma Cutis

There are four major forms of cutaneous calcification (calcinosis cutis): (1) dystrophic – locally within sites of pre-existing skin damage; (2) metastatic – due to systemic metabolic derangements; (3) iatrogenic – secondary to medical treatment or testing; and (4) idiopathic . An occasional patient will have a mixed form. Cutaneous ossification (osteoma cutis) occurs in the setting of several genetic disorders, in a miliary form on the face, and within neoplasms and sites of inflammation (secondary).