Maculopapular rash of unsuspected cause: systemic contact dermatitis to cinchocaine

Abstract

Topical medications are frequently neglected as the potential cause of systemic drug reactions. In this case report, a patient with a maculopapular eruption attributed to a drug hypersensitivity reaction was submitted to skin patch tests in order to clarify the drug implicated. Incidentally, a positive reaction to cinchocaine was observed. With the ulterior confirmation of the application of an antihemorrhoidal ointment containing cinchocaine, which was omitted during the initial anamnesis, the diagnosis of systemic contact dermatitis to cinchocaine was made.

• Cinchocaine
• local anesthetics
• skin patch tests
• systemic contact dermatitis

Declaration of interest

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.