in 29 patients with abscesses of the anorectal region the wall of the purulent collection was sectioned not only toward the tegumental surface but also to the anal canal with partial sectioning of the sphincter in 9 of the cases with superficial abscesses , and complete sectioning of the sphincter in the remaining 20 patients that presented with ischio-rectal abscesses , and with deep posterior anal abscesses .
C0227411
anal canal
C0003461
anal