Linear IgA dermatosis: a new cause of fever of unknown origin.

We describe a 60-year-old patient who presented with prolonged fever, weight loss, adenopathies and malaise. Two months later, an aphthous stomatitis and pharyngitis developed, together with ulcerations bilaterally in the groin. Two separate skin biopsies revealed the diagnosis of linear IgA dermatosis. This entity, which is well known to dermatologists but not to internists, should be added to the extensive list of disorders than can provoke the syndrome of fever of unknown origin.