Treatment of Perirectal Abscess

Diagnosis

The World Journal of Emergency Surgery recommends that imaging studies, such as CT, MRI, or endosonography, should be considered in cases with atypical presentation, suspected deep supralevator abscesses, or in patients with suspected inflammatory bowel disease 2, 3

The World Journal of Emergency Surgery suggests that incision and drainage is the cornerstone of treatment for all perirectal abscesses, and the incision should be kept as close as possible to the anal verge to minimize the length of a potential fistula while ensuring adequate drainage 1, 2
The World Journal of Emergency Surgery recommends that for larger abscesses, multiple counter incisions are preferred over a single long incision to prevent delayed wound healing 1
The Praxis Medical Insights guideline recommends that during the procedure, examination should be performed to identify any associated fistula tract, and if a low fistula not involving sphincter muscle is identified, fistulotomy can be performed at the time of abscess drainage 3
The Praxis Medical Insights guideline suggests that for fistulas involving sphincter muscle, a loose draining seton should be placed rather than performing immediate fistulotomy to prevent incontinence 3

The World Journal of Emergency Surgery recommends that antibiotics are not routinely indicated after adequate surgical drainage in immunocompetent patients, but antibiotic therapy is recommended in the presence of systemic signs of infection or sepsis, immunocompromised patients, incomplete source control, or significant surrounding cellulitis 1, 3
The World Journal of Emergency Surgery suggests that when indicated, empiric broad-spectrum antibiotic therapy should cover Gram-positive, Gram-negative, and anaerobic bacteria 1

The World Journal of Emergency Surgery recommends that fit, immunocompetent patients with small perianal abscesses and without systemic signs of sepsis may be managed in an outpatient setting 2
The Praxis Medical Insights guideline suggests that deeper or more complex abscesses may require more extensive drainage in an operating room setting 3

The Praxis Medical Insights guideline recommends that close follow-up is essential to monitor for recurrence or fistula development 4
The World Journal of Emergency Surgery suggests that the recurrence rate after drainage can be as high as 44%, with risk factors including inadequate drainage, loculations, horseshoe-type abscess, and delayed time from disease onset to incision 2
The World Journal of Emergency Surgery recommends that routine imaging after incision and drainage is usually not required unless there is recurrence, suspected inflammatory bowel disease, or evidence of a fistula/non-healing wound 2