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Observation
February 2018

Cutaneous Diphtheria Mimicking Pyoderma Gangrenosum

Author Affiliations
  • 1Department of Dermatology, Hospital Clínic, Universitat de Barcelona, IDIBAPS, Barcelona, Spain
  • 2Department of Microbiology, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
  • 3Department of Microbiology, Hospital Clínic, Universitat de Barcelona, ISGLOBAL, Barcelona, Spain
JAMA Dermatol. 2018;154(2):227-228. doi:10.1001/jamadermatol.2017.4786

Pyoderma gangrenosum (PG) is an inflammatory, noninfectious neutrophilic dermatosis that presents as painful nodules or pustules that rupture and form a necrotic ulcer with an irregular undermined violaceous border. The full list of differential diagnoses must be considered and excluded by clinicians before diagnosing PG to avoid erroneous treatments with systemic corticosteroids or other immunosuppressants.1 We report the case of a patient who presented with lesions that were identical to those found in PG but that occurred secondary to cutaneous diphtheria (CD).

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