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Chapter 33. Anorectum

All of the following are sites of perirectal fistulas, except

A. Suprasphincteric

B. Transsphincteric

C. Intersphincteric

D. Infralevator

E. Submucosal

The correct answer is D. Infralevator

Anal bleeding can be commonly caused by

A. Diverticulitis

B. Anal condyloma

C. Anorectal abscess (undrained)

D. Anal fissure

E. Thrombosed external hemorrhoids

The correct answer is D. Anal fissure

Rectal prolapse

A. Can be distinguished from prolapsed hemorrhoids based on exam showing concentric folds of the mucosa

B. Is more common in males

C. Cannot involve the muscular layers of the rectum due to fixation to the pelvic sidewalls

D. Is best evaluated by magnetic resonance imaging

E. Is more common in men than women

The correct answer is A. Can be distinguished from prolapsed hemorrhoids based on exam showing concentric folds of the mucosa

Squamous cell tumors of the anal canal

A. Are typically treated with a regimen of chemotherapy and radiation therapy after diagnosis

B. Are about as common as rectal cancers

C. Have a 25% response rate to initial therapy regimens

D. Typically require abdominoperineal resection for complete treatment

E. Rarely metastasize to regional lymph nodes

The correct answer is A. Are typically treated with a regimen of chemotherapy and radiation therapy after diagnosis

Condyloma acuminata

A. Are unlikely to recur after treatment

B. Are often treated with antiviral therapy as first-line treatment

C. Can be managed by palliation of macroscopic lesions by operation

D. Do not carry any risk of dysplasia

E. Are always asymptomatic

The correct answer is C. Can be ...

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