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Purpuric agave dermatitis.

M R Ricks1, P S Vogel, D M Elston

  • 1Wilford Hall Medical Center, Lackland Air Force Base, San Antonio, Texas, USA.

Journal of the American Academy of Dermatology
|February 20, 1999
PubMed
Summary
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Agave americana sap can cause a rare skin reaction called purpura, which involves bleeding under the skin. Histopathology revealed leukocytoclastic vasculitis, a type of inflammation.

Area of Science:

  • Dermatology
  • Toxicology
  • Botany

Background:

  • Agave americana, a subtropical plant, possesses sap with known irritants like calcium oxalate crystals and acrid oils.
  • While Agave-induced irritant dermatitis is documented, it is rarely reported.
  • Previous cases describe a papulovesicular eruption consistent with irritant contact dermatitis.

Observation:

  • A case of Agave-induced purpura in a healthy individual is presented.
  • The patient developed purpura following exposure to Agave americana.
  • This presentation is distinct from previously reported Agave-induced skin reactions.

Findings:

  • Histopathological examination of the affected skin revealed findings consistent with evolving leukocytoclastic vasculitis.
  • Leukocytoclastic vasculitis is characterized by inflammation of small blood vessels.

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Implications:

  • This case expands the known spectrum of Agave-induced dermatological reactions.
  • Highlights the potential for Agave sap to induce vasculitis, not just irritant contact dermatitis.
  • Suggests careful consideration of Agave exposure in patients presenting with purpura and vasculitic changes.