ARTHROSCOPY AND SPORTS MEDICINE Clinical outcomes of trochanteric syndrome endoscopically treated Andrea Domı ´nguez • Roberto Seijas • Oscar Ares • Andrea Sallent • Xavier Cusco ´ • Ramo ´n Cugat Received: 27 April 2014 Ó Springer-Verlag Berlin Heidelberg 2014 Abstract Background Greater trochanteric pain syndrome (GTPS) is clinically defined as greater trochanter pain with mechanical characteristics. Most cases of GTPS are resolved with conservative treatment. Surgical techniques are reserved for those who had unsatisfactory results with conservative treatment. Purpose The aim of the present paper is to describe the outcomes observed within endoscopic treatment of peri- trochanteric pathology. Methods Twenty-three patients were included in the present study, undergoing surgery between January 2010 and December 2011, diagnosed with GTPS and surgically treated with endoscopy. All patients were evaluated with Visual Analogue Scale (VAS), Western Ontario and McMaster Universities Arthritis Index (WOMAC) Modi- fied Harris Hip Score (mHHS) and Hip Outcome Score (HOS). The Scales were assessed before surgery and at 3, 6 and 12 months postoperatively. Results All scores showed statistically significant differ- ences (p \ 0.001) within all periods. Conclusion The endoscopic technique has proven to be safe and reproducible with good and excellent results, thus being an additional surgical procedure to consider within therapeutic management of greater trochanteric pain syndrome. Level of evidence: IV. Case series Keywords Greater trochanteric pain syndrome Á GTPS Á Surgical treatment Á Arthroscopy Á Trochanteric bursitis Á Endoscopic treatment Introduction Greater trochanteric pain syndrome (GTPS) also com- monly called trochanteric bursitis is clinically defined as greater trochanter pain with mechanical characteristics (tenderness to palpation over the greater trochanter, as well as pain with joint mobilization). Main differential diagnosis is made with the different syndromes that affect the same hip region due to the close anatomical relationship between the trochanter, trochanteric bursae, fascia lata and gluteal muscle insertions [1–5]. Myofascial aspects and bursae may be affected by changes in lower extremity biomechanics. Different entities can generate pain in the trochanteric area including lower extremity dysmetria, osteoarthritis, femeroacetabular impingement, degenerative tendon and the presence of radiating pain from the lumber spine [2, 4– 6]. The prevalence of GTPS is higher in women and people with dysmetria where the biomechanical changes in the joint may favor its development [1, 2]. Most cases of GTPS resolved with conservative treat- ment, including physical therapy, lifestyle modifications, weight loss, and treatment with NSAIDs. In refractory A. Domı ´nguez Universitat Internacional de Catalunya, Barcelona, Spain A. Domı ´nguez (&) Autonomous University of Barcelona, Barcelona, Spain e-mail: adominguezibarrola@gmail.com R. Seijas Á O. Ares Á X. Cusco ´ Á R. Cugat Fundacio ´n Garcı ´a-Cugat, Hospital Quiro ´n Barcelona, Barcelona, Spain A. Sallent Orthopedic Department, Hospital Vall d 0 Hebron, Barcelona, Spain 123 Arch Orthop Trauma Surg DOI 10.1007/s00402-014-2106-5