“…Fourteen studies described hip preservation (nonarthroplasty) surgical techniques in the management of hip PVNS, of which there were 7 studies that described arthroscopic techniques 21 , 22 , 23 , 24 , 25 , 26 , 27 and 8 studies that described open techniques. 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 One study described both open and arthroscopic techniques.…”