Aphthous ulcers responding to etretinate--a case report.

Aphthous ulcers are notoriously difficult to treat. We report repeated remission of recurrent aphthous ulceration in a female while taking etretinate for plantar pustular psoriasis. Although systemic retinoids are potent teratogens and are generally inappropriate for women of childbearing potential, this case report suggests further assessment of retinoids in severe aphthosis is warranted in selected patients.