Table 2. Summary of the Studies of Endoscopic Resection of the Lesser Trochanter for Ischiofemoral Impingement Syndrome.

No.	Study	No. of patients	Mean age (yr)	Sex	Mean preoperative ischiofemoral space on axial MRI (mm)	Surgical technique	Mean follow-up (mo)	Result
1	Safran et al. (2014)5)	1	19	Female	16	Anterior approach	24	Her iHOT score improved to 85, 53 points improvement.
2	Howse et al. (2014)6)	1	NM	NM	NM	Postero-lateral approach	NM	Good hip flexion was preserved.
3	Hatem et al. (2015)7)	5	33	4 Females, 1 male	8.9	Posterior approach	24	Their mean mHHS score improved to 94, 43 points improvement.
4	Jo et al. (2015)8)	1	17	Female	NM	Antero-lateral approach	4	Pain relief was maintained at 4-month follow-up.
5	Wilson et al. (2016)9)	7	46	6 Females, 1 male	NM	Anterior approach	12	Their mean mHHS score improved to 91, 48 points improvement.
6	Present case	2	43	2 Females	5	Antero-lateral approach	24	Their mean mHHS score improved to 85, 50 points improvement.

MRI: magnetic resonance imaging, iHOT: International Hip Outcome Tool, NM: not mentioned, mHHS: modified Harris hip scoring system.