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Lupus erythematosus vegetans.

S M Khorshid1, H L Beynon, M H Rustin

  • 1Department of Dermatology, The Royal Free Hospital, London, UK.

The British Journal of Dermatology
|December 3, 1999
PubMed
Summary
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Systemic lupus erythematosus can manifest as pyoderma gangrenosum-like lesions. This case introduces "lupus erythematosus vegetans," a novel term for this clinicopathological presentation.

Area of Science:

  • Dermatology
  • Immunodermatology
  • Rheumatology

Background:

  • Systemic lupus erythematosus (SLE) is a chronic autoimmune disease.
  • Pyoderma gangrenosum (PG) is a rare neutrophilic dermatosis.
  • Cutaneous manifestations of SLE are diverse.

Observation:

  • A 29-year-old woman with known SLE presented with exudative and vegetative plaques on her groins.
  • Clinical and histological findings initially suggested pyoderma gangrenosum.
  • Direct immunofluorescence revealed characteristic lupus band deposition.

Findings:

  • The patient was diagnosed with pyoderma gangrenosum.
  • Immunofluorescence showed IgG, IgM, and C3 deposition at the basement membrane zone.
  • These findings support an overlap between lupus erythematosus and pyoderma gangrenosum.

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Implications:

  • Proposes a new clinicopathological entity: lupus erythematosus vegetans.
  • Highlights the importance of immunofluorescence in diagnosing complex dermatological conditions.
  • Suggests a potential spectrum of cutaneous manifestations in lupus erythematosus.