Chronic recurrent annular neutrophilic dermatosis. An entity?

Two cases with recurrent annular lesions of similar clinical appearance and course are described. The histopathological investigations showed in both cases dense and diffuse infiltrates mainly of polymorphonuclear neutrophilic leucocytes in the mid dermis. No fever, leucocytosis or elevated ESR were observed. Systemic corticosteroid treatment controlled symptoms but recurrence after treatment was withdrawn occurred in both cases. It is discussed if we are dealing with a variant of Sweet's syndrome or a new entity.