Horseshoe Abscess

These cases are sometimes a little tricky. The patient had been suffering from severe butt pain for over a week. He couldn't even sit upright in a chair. He was feverish and had an elevated WBC count upon arrival in the ER. But on exam, you couldn't actually see any of the typical findings of perianal sepsis---no erythema, induration, or fluctuance. But it hurt him like hell when you tried to do a rectal exam. So we got the pelvic scan as seen above to help clarify the diagnosis.

What you see is a circumferential abscess/phlegmon, ringing the low rectum. You can't just lance these things at bedside like you can most abscesses. So I took him to the OR and made a couple of counter incisions to help effectuate complete drainage of the deeper pelvic sepsis. Then I like to leave a Penrose drain in situ, connecting the two incisions. It comes out in the office usually in a week.