Impact of hospital and surgeon case volume on morbidity in colorectal endometriosis management: a plea to define criteria for expert centers

Summary of background data National and international guidelines recommend referring patients with severe forms of endometriosis to expert centers. However, there is a lack of clear criteria to define an expert center. We examined the roles of surgeon and hospital procedure volumes as determinants of morbidity in deep infiltrating endometriosis of the rectum and sigmoid colon (DIERS).