TY - CHAP M1 - Book, Section TI - Anorectal Abscess & Fistula A1 - Doherty, Gerard M. PY - 2010 T2 - Quick Answers Surgery 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 SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/03/29 UR - accesssurgery.mhmedical.com/content.aspx?aid=58092340 ER -