Azathioprine-Induced Hypersensitivity Vasculitis
Michael Sangiorgio1, Anil Bhagwat1, Christopher Middleton1
1Royal Hobart Hospital, Liverpool St, Hobart, Tasmania, Australia.
Abstract:
Vasculitic skin rash is a rare but known manifestation of azathioprine hypersensitivity reactions, with several published case reports. In this report, we describe the case of a 63-year-old man on azathioprine for autoimmune hepatitis, who developed a delayed systemic hypersensitivity reaction with biopsy-proven vasculitis, approximately 10 months into his treatment. This resolved after azathioprine discontinuation and has not recurred to date after subsequent administration of 6-mercaptopurine. This case highlights the need for continued monitoring for delayed hypersensitivity reactions to azathioprine after initiation of therapy.
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