Background: Return to sports (RTS) rates and patient-reported outcomes (PROs) after hip arthroscopy in athletes with borderline dysplasia (BD) have not been established. Purpose: (1) To report minimum 2-year PROs and RTS rates in high-level athletes with BD who underwent hip arthroscopy for labral pathology in the setting of microinstability and (2) to compare clinical results with those of a matched control group of athletes with normal acetabular coverage. Study Design: Cohort study; Level of evidence, 3. Methods: Data were reviewed for surgery performed between January 2012 and July 2018. Patients were considered eligible if they received a primary hip arthroscopy in the setting of BD (lateral center-edge angle, 18°-25°) and competed in professional, collegiate, or high school sports. Inclusion criteria included preoperative and minimum 2-year follow-up scores for the modified Harris Hip Score, Non-arthritic Hip Score, Hip Outcome Score–Sport Specific Subscale, and visual analog scale for pain. Athletes with BD were matched to a control group of athletes with normal acetabular coverage (lateral center-edge angle, 25°-40°). Results: A total of 65 patients with BD were included in the study with a mean ± standard deviation follow-up of 47.5 ± 20.4 months. Athletes with BD showed significant improvement in all outcome measures recorded, demonstrated high RTS rates (80.7%), and achieved the minimal clinically important difference (MCID) and Patient Acceptable Symptom State (PASS) for the Hip Outcome Score–Sport Specific Subscale at high rates (MCID, 90.8%; PASS, 75.4%). When compared with a propensity-matched control group with normal acetabular coverage, capsular plication was performed more commonly in the BD group (93.8% vs 82.7%; P = .037). PROs and RTS, PASS, and MCID rates were similar between the BD and control groups ( P > .05). Conclusion: High-level athletes with BD who undergo primary hip arthroscopy for labral pathology in the setting of microinstability may expect favorable PROs and RTS rates at minimum 2-year follow-up. These results were comparable with those of a control group of athletes with normal coverage.

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Background: No studies have compared outcomes and return to sport (RTS) after hip arthroscopic surgery between matched groups of male and female athletes with a minimum 2-year follow-up. Purpose: (1) To report minimum 2-year postoperative patient-reported outcome (PRO) scores and the RTS rate for elite female athletes undergoing hip arthroscopic surgery for femoroacetabular impingement (FAI) and (2) to compare clinical results with a matched control group of elite male athletes. Study Design: Cohort study; Level of evidence, 3. Methods: Data on all consecutive female athletes who underwent primary hip arthroscopic surgery performed at our institution between March 2009 and July 2018 were collected. Patients were eligible if they underwent hip arthroscopic surgery for labral tears or FAI and participated in collegiate or professional athletics within 1 year of surgery. Minimum 2-year postoperative PRO scores were collected for the modified Harris Hip Score (mHHS), Nonarthritic Hip Score (NAHS), Hip Outcome Score–Sport-Specific Subscale (HOS-SSS), and visual analog scale (VAS) for pain as well as RTS status. The percentages of patients achieving the minimal clinically important difference (MCID) and patient acceptable symptomatic state were recorded. These patients were matched to elite male athletes for comparison. Results: A total of 73 female hips were included, with a mean follow-up of 65.1 ± 27.9 months. They demonstrated a significant improvement from preoperatively to latest follow-up on the mHHS, NAHS, HOS-SSS, and VAS ( P < .05). When outcomes were compared with a control group of male athletes, female athletes demonstrated lower preoperative scores, similar postoperative scores, and a significantly greater magnitude of improvement (delta value) on the mHHS, NAHS, and VAS. Female athletes also achieved the MCID at higher rates than did male athletes for the HOS-SSS (85.1% vs 70.0%, respectively; P = .035) and NAHS (79.1% vs 62.9%, respectively; P = .037). RTS rates among patients who attempted were similar between the 2 groups (female: 75.4%; male: 83.1%; P = .409). Conclusion: Elite female athletes undergoing primary hip arthroscopic surgery for FAI demonstrated a significant improvement in PRO scores and a high RTS rate. Female athletes exhibited a greater improvement in PRO scores (mHHS, NAHS, VAS) and achieved the MCID (HOS-SSS, NAHS) at higher rates compared with a control group of male athletes.

Background: Athletes who compete in flexibility sports (FS) place unique demands on their hip joints because of the supraphysiologic range of motion required. Purpose: To compare the pathologic features, outcomes, and return-to-sports (RTS) rates of high-level athletes participating in FS who underwent hip arthroscopy for femoroacetabular impingement syndrome (FAIS) and labral tear against a propensity score–matched cohort of high-level athletes participating in non–flexibility sports (NFS). Study Design: Cohort study; Level of evidence, 3. Methods: Data were prospectively collected and retrospectively reviewed for high-level athletes who underwent primary hip arthroscopy for FAIS from April 2008 to December 2018. Patients who participated in FS such as dancing, gymnastics, martial arts, figure skating, and cheerleading were propensity score matched by body mass index, age at time of surgery, sex, sports competition level, and labral treatment to a cohort of high-level athletes participating in all other sports, such as distance running, soccer, volleyball, and softball. Baseline patient characteristics, intraoperative findings, and surgical procedures were compared. Minimum 2-year patient-reported outcome measures were compared for the modified Harris Hip Score, Nonarthritic Hip Score, Hip Outcome Score–Sport Specific Subscale, and visual analog scale for pain and satisfaction. Rates of secondary surgery and RTS were compared. Results: A total of 47 patients (50 hips) who participated in FS were included and propensity score matched to 130 patients (150 hips) who participated in NFS. Follow-up time was 37.5 ± 10.4 months (mean ± SD). Most patients (96.0%) were female with a mean age of 19.5 ± 7.3 years. FS athletes had significantly higher rates of femoral head cartilage lesions (Outerbridge ≥2; 12.0% vs 2.0%; P = .008) and ligamentum teres tears (48% vs 26%; P = .003). FS and NFS athletes demonstrated significant clinical improvements after surgery for all patient-reported outcome measures. Of the patients who attempted, 34 (75.6%) participating in FS were able to RTS while 11 (24.4%) were not because of ongoing hip issues. This was not significantly different than the NFS group ( P = .073). Conclusion: High-level athletes who participated in FS and were treated for FAIS with hip arthroscopy exhibited higher rates of femoral head cartilage lesions and ligamentum teres tears requiring debridement when compared with a benchmark group of athletes who participated in other sports. Despite this, both groups demonstrated similar improvements in outcome scores and comparable rates of RTS at minimum 2-year follow-up.