Chapter 48: Anus- Perirectal Abscess

Question 1

What is it?

Answer 1

Abscess formation around the anus/rectum

Question 2

What are the signs/symptoms?

Answer 2

• Rectal pain
• drainage of pus
• fever
• perianal mass

Question 3

How is the diagnosis made?

Answer 3

Physical/digital exam reveals perianal/rectal submucosal mass/fluctuance

Question 4

What is the cause?

Answer 4

Crypt abscess in dentate line with spread

Question 5

What is the treatment?

Answer 5

As with all abscesses (except simple liver amebic abscess):

• drainage
• sitz bath
• anal hygiene
• stool softeners

Question 6

What is the indication for postoperative IV antibiotics for drainage?

Answer 6

• Cellulitis
• immunosuppression
• diabetes
• heart valve abnormality

Question 7

What percentage of patients develops a fistula in ano during the 6 months after surgery?

Answer 7

≈50%