Annular pompholyx.

The common manifestation of pompholyx is easily recognized by the clinician. Morphologic variants are known in which the predominant lesions are pustules or desquamation with or without erythema. A patient is described herein whose eruption was composed mainly of arciform, annular, and target-like vesicles. Pompholyx (bubble) is a preferred term because "dyshidrosis" denotes a dysfunction of sweating, which does not occur in this condition. The causes of this eruption have not been determined, but it is likely that a certain genetic predisposition and multiple environmental factors are responsible. Pompholyx should be considered in the differential diagnosis of eruptions with annular pattern.