This webinar will describe the assessment of bowel and urinary tract endometriosis by using bidimensional and 3D ultrasound. In particular, the panelists will provide information on how to evaluate the presence of rectosigmoid endometriosis and how to assess its characteristics to predict the type of surgical procedures (shaving, discoid resection, and segmental resection). Furthermore, the panelists will describe how to evaluate urinary tract endometriosis, and they will show how ultrasonography can help to plan the various surgical procedures: ureterolysis, ureteral resection, partial cystectomy and nephrectomy.