Summary ANATOMY OF THE PERINIUM

PERINEUM • The perineum is traversed by • urethra and anal canal in the male, and • urethra, vagina, and anal canal in the female. • The surface features of the perineum • in male are penis, scrotum, and anal orifice, • in the female are vulva (female external genitalia) and anal orifice . • The median region between vaginal and anal orifices in female, containing perineal body is considered as gynecological perineum. Boundaries • The perineum has superficial and deep boundaries. • Superficial Boundaries • In lithotomy position, the perineum is diamond shaped and is bounded as follows: • Anteriorly: by scrotum in male and mons pubis in female. • Posteriorly: by buttocks. • On each side: by the upper medial aspect of the thigh Cont…. Deep Boundaries • The deep boundaries of the perineum correspond to the boundaries of the pelvic outlet as follows : • Anteriorly: Inferior margin of the pubic symphysis (actually arcuate pubic ligament). • Posteriorly: Tip of the coccyx. Cont… On each side: • – Anterolaterally: Conjoint ischiopubic ramus. • – Laterally: Ischial tuberosity. • – Posterolaterally: Sacrotuberous ligament.