Medical Encyclopedia:
Endorectal Ultrasound: Purpose
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More about Endorectal Ultrasound:
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ERUS is used as a diagnostic procedure in rectal cancer to determine stage of the tumor and as a postradiation, presurgical examination to assess extent of tumor shrinkage. ERUS can also be used in cases of anal fistula (an abnormal passage) and problems with the anal sphincter muscles (muscles that control the opening and closing of the anus).
— Janie F. Franz
