DE and not DIE
For this study we did not use the definition of Koninckx et al., in 1990 for deep infiltrating endometriosis (DIE) (10), which can only be confirmed by the pathologist (endometrial implants penetrate more than 5 mm into the peritoneum). We used the definition described by Donnez (11), which is a nodular form of deep endometriosis (DE) which we classified with the Enzian based on clinical expertise combined with radiological and intra-operative findings.