*4.2.1 Posterior perineum*

Posterior perineum divided into 2 compartments, infra-levator space and the clinical ischioanal space by a septum [8]. Abscess in the intra-levator space presents similarly as a clinical supralevator abscess and may not be apparent from external inspection. It can tract anteriorly to the deep perineal space. Infection/abscesses in the clinical ischioanal space is easily diagnosed by clinical examination externally due to inflamed, indurated or fluctuant ischioanal fossa.
