Two cases of gigantic dystrophic calcinosis cutis caused by subcutaneous and/or intramuscular injections.

We describe two female patients with gigantic dystrophic calcinosis cutis caused by a large number of sunbcutaneous and/or intramuscular injections which they received when they were much younger. Laboratory data and physical examinations were generally within normal limits, and we detected no disease which might induce cutaneous calcification. There are many reports of dystrophic calcinosis cutis caused by injection of several kinds of drugs. However, we found no previous report describing a patient with calcinosis cutis induced by local tissue injury from a large number of injections and with extraordinarily widespread calcification at the injection sites. Because we do not know the exact drugs injected, it is difficult to say if a specific ingredient in the injections was related to this condition. We do know that a large number of subcutaneous or intramuscular injections were frequently administered to patients who had difficulty in maintaining venous infusions in the past, so there may be similar cases of dystrophic calcinosis cutis which have not been reported.