The surgical anatomy of the male urethral complex following a radical prostatectomy. B, bladder; DA, detrusor apron; FSS, fascia of the striated sphincter; ML, Mueller's ligaments; MDR, medical dorsal raphe; NVB, neurovascular bundle; OS, Os ischiadicum; PB, pubis bone; P, prostate; PPL, pubovescicalis ligament; PP, puboperinealis muscle; R, rectum; RU, rectourethralis muscle; SS, striated sphincter.