Associated pyoderma gangrenosum, erythema elevatum diutinum, and Sweet's syndrome: the concept of neutrophilic disease.

Background: The association of three neutrophilic dermatoses supports the concept of "neutrophilic disease" as a syndrome representing a continuous spectrum of clinical entities.

Results: This report describes three neutrophilic pathologies arising in the same patient, in association with seronegative rheumatoid arthritis. The successive occurrence of erythema elevatum diutinum, pyoderma gangrenosum, and Sweet's syndrome illustrates the concept of "neutrophilic disease" developed by Wallach et al.