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Atypical warfarin-induced skin necrosis
Ceressa T Ward1, Nann Chavalitanonda
1Department of Pharmacy Practice, Nova Southeastern University College of Pharmacy-West Palm Beach Program, Palm Beach Gardens, Florida 33410, USA. ceressa@nsu.nova.edu
Pharmacotherapy
|July 26, 2006
Summary
Warfarin-induced skin necrosis (WISN) can occur years after starting warfarin, affecting obese women. Prompt evaluation of skin lesions is crucial for managing this rare but serious adverse drug reaction.
Area of Science:
- Dermatology
- Pharmacology
- Pathology
Background:
- Warfarin-induced skin necrosis (WISN) is a rare complication of warfarin therapy.
- Its etiology is unclear, but it predominantly affects obese women.
- WISN typically manifests within 10 days of warfarin initiation, but late-onset cases are documented.
Observation:
- A 43-year-old Caucasian woman with a history of thromboembolic disorders and protein S deficiency presented with rapidly progressing dermatitis.
- Physical examination revealed diffuse, "lace-like" erythematous eruptions with ulcerated and crusted lesions.
- Histopathological findings confirmed warfarin-induced skin necrosis.
Findings:
- A probable causal relationship was established between warfarin use and the development of skin necrosis.
- The patient's presentation was consistent with a delayed hypersensitivity reaction to warfarin.
Implications:
- This case highlights the potential for late-onset WISN, even years after initial warfarin exposure.
- Early recognition and diagnosis of WISN are essential for appropriate management and prevention of severe sequelae.
- Further research into the underlying mechanisms of WISN is warranted to improve patient outcomes.
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