Fig. 4From: Role of preoperative ultrasound mapping in the surgical management of deep infiltrating endometriosis: a prospective observational studya and b Transverse TVS image at the level of USL in a 35-year-old woman showing right and left USL (red and green arrows) as well as torus uterinum DIE (blue star) giving a “butterfly” configuration. c Intraoperative photograph showing the butterfly lesion. d and e Sagittal TVS image showing left USL (white arrow) and caudal rectal bowel DIE (black arrow) giving a “tram-track” configuration. f 3D volume acquisition of the “tram-track” lesion using tomographic ultrasound imaging (TUI)Back to article page