Adalimumab is a recombinant, fully human IgG1 monoclonal antibody that binds specifically to human TNF-a and neutralizes the activity of this cytokine. We report herein the case of a lichenoid eruption with the use of adalimumab in a patient with rheumatoid arthritis. The eruption improved after interruption of adalimumab, with recurrence at the reintroduction and improvement again with definitive suspension. Although this patient was receiving concomitant adalimumab with methotrexate, corticosteroids and other drugs, these medications except the adalimumab were not discontinued or modified at any moment during the period. The occurrence of lichenoid eruption with adalimumab is a not expected event since the function of the TNF-a in the immunopathology of lichen planus seems to be as a propagator of disease. This way, we would expect that drugs with anti-TNF-a effect would not act as inductors of lichen planus but could be used in its treatment.
lichenoid eruptions; antibodies; monoclonal; tumor necrosis factor-alpha; drug eruptions; arthritis, rheumatoid
