Atypical erythema multiforme--a marker of malignancy? Report of a case occurring with renal cell carcinoma.

A patient who presented with clinically atypical erythema multiforme was found, on investigation, to have an occult renal cell carcinoma. The skin eruption did not respond to systemic steroids, but resolved completely when the tumor was excised. Atypical erythema multiforme in a patient warrants a search for underlying malignancy.