Scrotal calcinosis: calcification of epidermal cysts.

The so-called idiopathic scrotal calcinosis does not appear to be idiopathic, but rather a process of dystrophic calcification of epidermal cysts. We report a case that would be otherwise called "idiopathic" where we found squamous epithelial lining around the calcified masses. Literature is reviewed in support of the view that the calcified scrotal nodules are related to epidermal cysts.