Narrow pelvic inlet plane area and obesity as risk factors for anastomotic leakage after intersphincteric resection

Figure 1 Variables identified with three-dimensional pelvimetry. A: Lateral view; B: pelvic inlet plane; C: Pelvic outlet plane; D: Lateral view. 1: Anteroposterior pelvic inlet diameter; 2: Anteroposterior pelvic outlet diameter; 3: Length of the pubic symphysis; 4: Distance from the sacral promontory to the coccyx; 5: Transverse pelvic inlet diameter; 6: Pelvic inlet area; 7: Transverse pelvic outlet diameter; 8: Pelvic outlet area; 9: Lumbosacral (tortuosity) angle at the sacral promontory.