Does psoas size predict postoperative thigh pain in extreme lateral interbody fusion?

When considering patients for multilevel lateral lumbar spine surgery, MRI evaluation of anterior-posterior diameter of psoas size and gender of patient is helpful in predicting cases with higher risk of developing postoperative thigh pain. When anterior-posterior psoas diameter is more than 49.51 mm (for multiple level surgeries), consideration to approach via an anterior to psoas lateral approach or greater discussion with postoperative expectation would be warranted.