The posterior subsphincteric space; its relation to posterior horseshoe fistula.
D001003:Anal Canal / Q000033:anatomy & histology*; D005402:Fistula; D006652:Histological Techniques; D006801:Humans; D012007:Rectum / Q000033:anatomy & histology*
ANUS/anatomy and histology; RECTUM/anatomy and histology