經(jīng)腹會陰直腸癌根治術(shù)后腹腔臟器和組織經(jīng)盆腔底部腹膜縫合裂開處凸入骶前間隙，稱經(jīng)腹會陰直腸癌根治術(shù)后盆底腹膜疝(peritoneal hernia of pelvic floor caused by miles operation)，亦稱經(jīng)腹會陰直腸癌根治術(shù)后盆底疝(hernia of pelvic floor caused by miles operation)。臨床上少見，多發(fā)生在腹會陰直腸癌根治術(shù)后早期，于腹壓增加或抽取止血紗布時腸管脫出。術(shù)后晚期則表現(xiàn)為會陰部可復(fù)性包塊。