Yes, it is controversal whether the bursa exists, 90 % stduies reported negative results. But this study reported positive results, it is small study though, but it is new. Here is the paper: Hariri S, Savidge E, Reinold MM, Zachazewski J, Gill TJ. Treatment of recalcitrant iliotibial band friction syndeome with open iliotibial band bursectomy. Am J Sport Med 2009