The dorsal vein complex was not charted and resulted in bleed, the sphincter and neurovascular anatomy was not understood and resulted in incontinence and impotence.

• （既往，）由于背静脉丛解剖不清而导致出血，由于未能明确括约肌与神经血管的解剖而致使尿失禁与阳萎发生。