患者男性,61岁,2个月前出现肛门周围疼痛,肛门左侧皮肤出现发红、肿胀及触痛,偶有黄色分泌物排出。体检:胸膝位9点、距肛门3 C m处见一红色乳头状突起,略红肿,压之有量脓性分泌物排出。直肠指诊:在直肠左壁可扪及一硬结及条索样管状物。可明确管状物的分布情况的检查是
A.
直肠指诊
B.
肛门镜
C.
血常规检查
D.
碘油瘘管造影
E.
B超
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