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Recurrent pyoderma gangrenosum-like ulcers induced by oral anticoagulants



Recurrent pyoderma gangrenosum-like ulcers induced by oral anticoagulants



Annales de Dermatologie et de Venereologie 141(1): 34-38



Other than the classic skin necrosis induced by oral anticoagulants (OAC) in patients with protein C and S deficiencies, other types of OAC induced-skin ulcers are little known. Herein, we describe an original case of recurrent pyoderma gangrenosum (PG)-like ulcers induced by OAC. A 70-year-old female heart-transplant recipient presented deep, hyperalgesic and quickly-spreading necrotic ulceration of the right leg 6 weeks after starting oral anticoagulant therapy with fluindione. Histological analysis revealed dermal infiltrate containing polynuclear neutrophils, which accords with the histopathological diagnosis of leukocytoclastic vasculitis or PG. Infectious, autoimmune and thrombophilic causes were ruled out. Fluindione was withdrawn and the ulcer healed completely within a month. Six months later, right leg ulceration recurred two weeks after the patient resumed fluindione but healed within 1 month of discontinuation of the drug. An OAC from another chemical family (warfarin) was then introduced, with further recurrence of ulceration after 2 weeks of treatment. The chronology of events and the negativity of aetiological explorations allowed a diagnosis to be made of OAC-induced skin ulcer, a rare complication of which the pathophysiology is unclear. This is the first case of PG-like ulcers induced by OAC.

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Accession: 055420876

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PMID: 24461092

DOI: 10.1016/j.annder.2013.09.159


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