Deep endometriosis is a lesion defined as an invasion of the tissue to a depth of more than 5 mm. This lesion may be secondary to the development of superficial endometriosis or inaugural. Unlike superficial endometriosis, deep endometriosis can alter the function of the organs affected: vagina, bladder, colon, small intestine, pelvic nerves, diaphragm, perineum (history of episiotomy), Caesarean section scar, etc. . The symptoms of deep pelvic endometriosis are variable and often linked. These lesions are visible on medical imaging.