Calcinosis cutis following electromyographic examination.

We report the first case of calcinosis cutis following electromyographic examination. All previously reported cases of iatrogenic calcinosis cutis occurred following electroencephalographic examination using calcium-containing electrode compounds or following the extravasation of calcium-containing solutions along infiltrated intravenous lines. We also review the literature on calcinosis cutis due to iatrogenic and occupational exposure to calcium salts. The clinical presentation of calcinosis cutis is variable, but the histologic appearance is diagnostic. This entity may be underreported because of its benign, self-limited course and lack of recognition by physicians. Calcinosis cutis should be recognized by family practitioners, dermatologists, and subspecialists who encounter patients who have undergone prolonged monitoring studies that involve the use of electrodes.