"characterised by normal serum calcium and phosphorus; an underlying disease process induces tissue damage"
"an underlying disease process induces tissue damage, e.g. scleroderma (in particular CREST syndrome), systemic lupus erythematosus, cutaneous neoplasms (e.g. pilomatricoma), inherited skin disorders (e.g. pseudoxanthoma elasticum)"
"calcinosis cutis universalis: diffuse involvement of skin, subcutaneous tissues, muscles and tendons"