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【单选题】
患者,男,41岁。肛肿痛3天,肛门左侧皮肤发红伴疼痛,以坐排便。2天前加剧并局部肿胀,无畏寒、发热。查体:胸膝位肛门11点处局部肿胀约2cm*2cm,有脓头,围皮肤发红,波动感(+)。该病最可能的诊断是A.
内痔
B.
外痔
C.
肛旁脓肿
D.
痔行药物注射治疗后
E.
血栓性外痔剥离术后
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