Background: Limits of Wells'syndrome, a nosologically enlarged entity defined after classic eosinophilic cellulitis, are imprecise. We report on a new "frontier" case, remarkable in its clinical pattern and its high sensitivity to antimalarial drugs.
Case report: A 35-year-old woman was referred for evaluation of recurrent inflammatory, figurated and often annular lesions, mainly located on the trunk and the proximal parts of the limbs, associated with significant peripheral eosinophilia and featuring dense perivascular infiltrates throughout the dermis with abundant eosinophils but without any "flame figure". These lesions responded dramatically to protracted treatment with hydroxychloroquine.
Discussion: The relationship of this affection to Wells' syndrome is discussed along with its possible similarities to the sparse reports of so-called eosinophilic annular erythema.