RT Book, Section
A1 Doherty, Gerard M.
SR Print(0)
ID 58092073
T1 Anal Fissure & Ulcer
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=58092073
RD 2024/04/24
AB •  Fissure:  Split  in  the  anoderm•  Ulcer:  Chronic  fissure•  Associated  with  skin  tag  (sentinel  pile)  once  matured•  Located  in  midline,  distal  to  dentate  line•  Most  commonly  located  posteriorly  (90%)•  Caused  by  forceful  dilatation  of  anal  canal,  usually  from  defecation,  leading  to  sphincter  spasm  and  local  anoderm  ischemia