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Recurrent Coumarin-Induced Skin Necrosis in a Patient With an Acquired Functional Protein C Deficiency
Robert G. C. Teepe, MD;
Andre W. Broekmans, MD;
Bert Jan Vermeer, MD;
Annette M. Nienhuis, MD;
Emil A. Loeliger, MD
Arch Dermatol. 1986;122(12):1408-1412.
Abstract
An elderly woman who had been receiving long-term oral anticoagulant therapy developed skin and subcutaneous fat necrosis on five repeated occasions of extreme hypocoagulability, associated with coinciding periods of congestive cardiac failure. In each episode, the skin necrosis developed within days after the prothrombin time (as determined with Thrombotest) exceeded 200 s (International Normalized Ratio >5.4). Widepread thrombosis in the subcutaneous vasculature and interstitial bleeding, as observed in a skin biopsy specimen, were consistent with a diagnosis of coumarin necrosis. On two occasions, an acquired functional protein C deficiency was present. It is hypothesized that an imbalance between anticoagulant and procoagulant vitamin K-dependent factors contributed to the pathogenesis of coumarin-induced skin necrosis. This imbalance was related to repeated periods of congestive heart failure.
(Arch Dermatol 1986;122:1408-1412)
Author Affiliations
From the Departments of Dermatology (Drs Teepe and Vermeer), Hematology (Drs Broekmans and Loeliger), and Internal Medicine (Dr Nienhuis), University Hospital, Leiden, the Netherlands.
Footnotes
Accepted for publication April 23, 1986.
Reprint requests to Department of Dermatology, University Hospital, PO Box 9600, 2300 RC Leiden, the Netherlands (Dr Teepe).
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