RT Book, Section
A1 Doherty, Gerard M.
SR Print(0)
ID 58092340
T1 Anorectal Abscess & Fistula
T2 Quick Answers Surgery
YR 2010
FD 2010
PB The McGraw-Hill Companies
PP New York, NY
SN 
LK accesssurgery.mhmedical.com/content.aspx?aid=58092340
RD 2024/04/24
AB •  Result  from  occlusion  of  anal  glands  and  crypts  at  the  dentate  line•  Occlusion  may  follow  impaction  of  vegetable  matter  or  edema  from  trauma•  Abscesses  are  classified  according  to  space  they  invade-Supralevator-Ischiorectal-Superficial-Intersphincteric-Transphincteric•  May  also  develop  as  a  result  of  inflammatory  bowel  disease  (Crohn)•  Fistula-in-ano  from  the  anus  to  the  perianal  skin  develops  when  abscess  cavity  maintains  persistent  communication  with  the  crypt•  Goodsall  rule:  Used  to  identify  direction  of  fistula  tract  -Anterior  external  opening:  Tract  extends  in  a  radial  direction  to  the  dentate  line  -Posterior  external  opening:  Fistula  tract  curves  to  the  posterior  midline