Dermatological manifestations of toxic agents.

A great variety of cutaneous disorders can be seen as reactions to toxic substances. To limit the extent of this review, cutaneous manifestations known to have an immunological mechanism are simply listed with pertinent references. The report has been focused to cover the cutaneous manifestations of toxic agents of non-immunological and unknown mechanisms. Entities discussed include acne, alopecia, dermatitis caused by spider bites, pityriasis rosea, and chemically-induced scleroderma.