Anoscope is used to visualize the internal opening of<unk> . Sigmoidoscopy is used to visualize the opening of<unk>  in the rectum.
Anal fistula other imaging findings
Perianal abscess risk factors
Anal fissure risk factors
Anal fissure laboratory findings
Anal fissure differential diagnosis
Anal cancer other imaging studies
Ischemic colitis other imaging findings
Bowel obstruction other imaging findings