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Scabies Associated with Granulomatous Dermatitis.

Jessica Harris1, Rajiv Nathoo1, Vladimir Vincek1

  • 1Department of Dermatology, University of Florida College of Medicine, Gainesville, Florida, USA.

Case Reports in Dermatology
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Summary

Scabies, a common parasitic infection, can trigger granuloma annulare. This case shows a non-necrotizing granulomatous dermatitis in an elderly woman following scabies, emphasizing scabies in differential diagnoses.

Keywords:
DermatitisGranulomaGranulomatousScabies

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Area of Science:

  • Dermatology
  • Parasitology
  • Pathology

Background:

  • Scabies is a common parasitic infestation caused by the mite Sarcoptes scabiei.
  • Granuloma annulare is a benign inflammatory skin condition with characteristic histopathological findings.
  • A potential association between scabies and granuloma annulare has been anecdotally reported.

Observation:

  • An 86-year-old female presented with a skin condition following a confirmed scabies infestation.
  • Histopathological examination revealed non-necrotizing granulomatous dermatitis.
  • No other apparent cause for the granulomatous reaction was identified.

Findings:

  • The patient developed non-necrotizing granulomatous dermatitis subsequent to scabies.
  • This presentation suggests a possible link between scabies infestation and granulomatous skin reactions.
  • The histological pattern was consistent with granuloma annulare or a related granulomatous dermatitis.

Implications:

  • Clinicians should consider scabies in the differential diagnosis of unexplained granulomatous dermatitis, particularly in endemic areas.
  • Early diagnosis and treatment of scabies may prevent the development of secondary dermatological conditions.
  • This case contributes to the understanding of unusual cutaneous manifestations of common parasitic infections.