[Lichen planus-like eruption. Case report].

Cutaneous adverse drug reactions are among the most common adverse drug reactions. Thise reactions to drugs can comprise a broad spectrum of clinical and histopathological features, with an important capacity to mimic numerous dermatological diseases, making the diagnose very difficult. We present the case of a patient, under immunomodulating treatment (TNFalpha antagonist and leflunomide), with a muco-cutaneous lichen planus-like eruption.