“…These abnormal crypts are predisposed to infection and abscess formation, which may be cured, recur, or develop into fistula-in-ano. 1,2,4,6,7 Recurrences and/or development of fistula-in-ano (RF) rates after treatment of perianal abscess are reported in 0 to 85% of cases. This wide range may be due to therapeutic differences (i.e., conservative management vs. surgical intervention) or conventions in reporting and designating fistulas as recurrences or complications.…”