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Delayed cutaneous hypersensitivity reactions to hirudin.
K J Smith1, J Rosario-Collazo, H Skelton
1Department of Dermatology, University of Alabama, Birmingham, AL 35294-0009, USA. hskelton@pathuab.edu
Archives of Pathology & Laboratory Medicine
|December 12, 2001
Summary
This study details a rare delayed hypersensitivity reaction to hirudin, a synthetic antithrombin. The reaction, characterized by granulomatous inflammation, occurred after extravasation during treatment for heparin-induced thrombocytopenia.
Area of Science:
- Cardiology
- Pharmacology
- Dermatology
Background:
- Hirudin is a synthetic antithrombin agent used for heparin-induced thrombocytopenia and hypersensitivity to heparin products.
- It is comparable to heparin as an antithrombotic and has been studied for acute myocardial infarction treatment.
Observation:
- A patient with a history of type II heparin-induced thrombocytopenia received intravenous hirudin therapy.
- Following extravasation at the IV site, the patient developed a delayed hypersensitivity reaction.
Findings:
- Histological examination of the reaction site revealed an epithelioid granulomatous infiltrate.
- This represents a rare, characterized hypersensitivity reaction to hirudin with described histopathologic changes.
Implications:
- This case highlights the potential for delayed hypersensitivity reactions to hirudin, even after extravasation.
- Understanding the histopathology of these rare reactions is crucial for patient management and monitoring.
- Further research is needed to fully characterize hirudin hypersensitivity reactions.