Anatomy of the female pelvis on sagittal section. A) Sketch diagram of the sagittal section of female magnetic resonance pelvis showing normal anatomy. Figure B is the corresponding sagittal T2W image demonstrating the anatomic structures that are commonly affected in endometriosis namely prevesical space (orange), peritoneal refection (green), vesicovaginal septum (light blue), vesicouterine space (pink), rectouterine space (dark blue), rectovaginal septum (violet), and presacral space (red). Figure C depicts the 3 anatomic compartments, namely, anterior (bounded by yellow line), middle (bounded by pink line), and posterior (bounded by orange line), used in reporting deep infiltrative endometriosis