In women, an anatomical area known as the perineum separates the opening of the vagina from that of the anus. Each opening is surrounded by a wall, and the anal wall is separated from the vaginal wall by a mass of soft tissue including: * The muscles of the anus (corrugator cutis ani, the internal anal sphincter and the external anal sphincter) * The medial muscles of the urogenital region (the superficial transverse perineal muscle, the deep transverse perineal muscle and bulbocavernosus) * The medial levator ani muscles (puborectalis and pubococcygeus) * The fascia of perineum, which covers these muscles * The overlying skin and subcutaneous tissue A<unk>  may involve some or all of these structures, which normally aid in supporting the pelvic organs and maintaining faecal continence.
Perineal tear
Perineal hernia
Perianal hematoma
Rectovaginal fistula
Retroperitoneal fibrosis
Vesicovaginal fistula
Sigmoidocele
Urethrovaginal fistula