How should a patient with Crohn's disease presenting with a perianal abscess be initially managed?

• A. Drainage of the abscess, broad-spectrum antibiotics, and evaluation for fistula involvement.
• B. Immediate ileal resection.
• C. Start high-dose steroids.
• D. Withhold antibiotics.

Answer: (A)

The important point is that infection control and mapping of fistulous disease come first. A perianal abscess in Crohn’s disease is treated by promptly draining the abscess to remove pus and relieve pressure, which is necessary to stop the infection from spreading. After drainage, broad-spectrum antibiotics are used because the abscess often harbors mixed flora, including anaerobes, and antibiotics help prevent systemic spread while the local drainage does its job. At the same time, it’s crucial to evaluate for fistula involvement because Crohn’s commonly creates fistulous tracts around the anal region; imaging and surgical assessment guide definitive management, which may include referral to colorectal surgery and procedures like seton placement if a fistula is present.

Further steps like an immediate ileal resection aren’t appropriate during an active abscess, as surgery without first controlling the infection can be risky and unnecessary. Initiating high-dose steroids during an active infection can worsen the situation by suppressing the immune response, so steroids aren’t part of the initial management for an infectious abscess. Withholding antibiotics would permit the infection to worsen, increasing the risk of sepsis.