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【单选题】
患者,男,52岁。3年前诊断为下肢脉,近2个月来出现左下肢第一足趾渐渐变黑、变硬、千燥、疼痛。此足趾最为可能的病变为( )
A.
干性坏疽
B.
混性坏疽
C.
黑色素瘤
D.
出血性坏死
E.
液化性坏死
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