A 65-yo woman with hepatitis C, cirrhosis, renal impairment, hypertension, and restrictive cardiomyopathy had severe finger pain in both hands for several years, recently progressing to gangrene. What is the underlying cause?
Fungal melanonychia
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Cryoglobulinemia-induced vasculitis
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Flesh-eating bacteria (necrotizing group A strep)
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Warfarin-induced skin necrosis
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Scleroderma
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