Citations

Purpose To evaluate the agreement between a simple magnetic resonance imaging‐based measurement method for determining the patellar tendon‐to‐lateral trochlear ridge (PT‐LTR) distance using an external adhesive marker and a previously validated conventional measurement technique. Methods Patients diagnosed with patellofemoral instability before undergoing primary patellar stabilization surgery at a single institution between 2020 and 2024 were eligible for inclusion. PT‐LTR distances were measured in a blinded fashion by 2 musculoskeletal‐trained radiologists using the conventional technique and by an orthopaedic group using the simple technique. Interrater reliability between the musculoskeletal‐trained radiologists and between the orthopaedic groups was calculated using intraclass correlation coefficients (ICCs) and concordance correlation coefficients (CCCs) and subsequently intermethod reliability between the 2 groups. The measurements were plotted on concordance correlation graphs. Results One hundred knees (38 right, 62 left) from 97 patients (37 men, 60 women; mean age 22 ± 9 years) were included. The average distance for PT‐LTR measured by the radiologists using the conventional technique was 10.9 ± 7.5 mm and by the orthopaedic group using the simple technique was 9.3 ± 6.8 mm. Excellent interobserver agreement was noted for the radiologist group (ICC 0.941, 95% confidence interval [CI], 0.914‐0.960; CCC 0.941, 95% CI, 0.915‐0.959) and orthopaedic group (ICC 0.976, 95% CI, 0.964‐0.985; CCC 0.976, 95% CI, 0.965‐0.984). Excellent intermethod agreement was noted between the 2 techniques (ICC 0.903, 95% CI, 0.775‐0.942; CCC 0.902, 95% CI, 0.861‐0.932). Conclusions There was excellent interobserver reliability for measuring PT‐LTR distance using both the conventional radiologist‐based technique and the external adhesive marker technique. Excellent intermethod agreement was also shown between the 2 techniques, with comparable mean measurements between groups; thus, the simple technique can be used as a reproducible alternative for PT‐LTR distance. Level of Evidence Level III, retrospective comparative study.

Purpose To assess the reliability, predictability, and discriminative capacity of 3 anatomic measurements, tibial tubercle‐trochlear groove (TT‐TG), tibial tubercle‐posterior cruciate ligament, and patellar tendon‐lateral trochlear ridge (PT‐LTR), where PT‐LTR may offer a complementary approach to assessing recurrent patellofemoral instability (PFI) risk. Methods Patients diagnosed with PFI before primary patellofemoral stabilization surgery at a single institution between 2022 and 2024 were included. A control group without PFI was propensity matched 1:1 for age, sex, and laterality. Magnetic resonance images were evaluated to measure TT‐TG, tibial tubercle‐posterior cruciate ligament, and PT‐LTR. A priori power analysis determined the cohort size. Statistical analyses compared differences between the PFI and control groups with Student t‐tests, receiver operating characteristic analyses, and area under the curve with resultant sensitivity, specificity, and an optimal cutoff. Results Patients included 50 knees with PFI (28 women, 22 men; mean age 18 ± 5 years). The control group included 50 knees (27 women, 23 men; mean age 18 ± 4 years). Excellent inter‐ and intra‐rater reliability (intraclass correlation coefficient > 0.7) was shown for TT‐TG and PT‐LTR in the PFI and control groups. The distances for TT‐TG, tibial tubercle‐posterior cruciate ligament, and PT‐LTR were significant predictors ( P ≤ .025) of PFI. The average PT‐LTR distance difference for the PFI and control groups was 7.0 mm ( P < .001). PT‐LTR showed an area under the curve of 0.80 and, when ≥4.6 mm, was 66% sensitive and 92% specific for PFI. Conclusions The PT‐LTR distance is a reliable and discriminative metric for identifying PFI in both pediatric and adult populations. A PT‐LTR cutoff value of 4.6 mm showed diagnostic discrimination and substantially high specificity for recurrent PFI, indicating strong ability to identify patients with instability. Level of Evidence Level III, retrospective case control study.

Background: Dancers are at risk of femoroacetabular impingement (FAI) owing to supraphysiologic range of motion and associated demands placed on their hips. There remains a paucity of literature on midterm outcomes in dancers who undergo primary arthroscopy and labral repair for FAI. Purpose: To determine the rate of return to dance and patient-reported outcome measures in competitive dancers after hip arthroscopy with labral repair for FAI with minimum 2-year follow-up. Study Design: Case series; Level of evidence, 4. Methods: This study included dancers with FAI undergoing primary hip arthroscopy with labral repair from 2010 to 2022. Patient-reported outcome measures were collected at 2-year minimum follow-up: modified Harris Hip Score (overall, activities of daily living, gait, pain), Hip Outcome Score (activities of daily living, sports-specific subscale), Tegner Activity Scale, visual analog scale for pain, and surgery satisfaction. Patients were evaluated for preoperative radiographic measurements, postoperative return to sport, and revision surgery. Return to dance was evaluated. Results: Thirty-seven dancers were followed for a mean 7.4 years (range, 3.2-12.2) postoperatively (36 female and 1 male; mean ± SD age, 21 ± 7 years; mean body mass index, 23.3 ± 4.5). All outcome scores significantly improved postoperatively as compared with preoperatively ( P ≤ .037). Twenty dancers (71%) returned to dance. Of those who returned to dance, 17 (85%) returned to sport at the same or higher level as compared with the preoperative level. At final follow-up, 45% of dancers who initially returned to dance continued to dance. Of the dancers who no longer participated in dance at final follow-up, 7 (65%) quit dancing for nonhip-related reasons. Mean surgery satisfaction (0-10) at final follow-up was 7.1. Four patients (10%) underwent revision hip arthroscopy with revision labral repair. Conclusion: Hip arthroscopy with labral repair in dancers results in sustained improvements in function and pain at minimum 2-year follow-up. Most dancers return to their prior levels of dance, and nearly half remain active several years later. Notably, discontinuation of dance was often unrelated to hip symptoms, underscoring the importance of counseling patients on clinical and lifestyle factors influencing return to sport.

Hip arthroscopy is an increasingly common procedure to treat intra‐articular conditions such as labral tears and femoroacetabular impingement. With the increase in frequency of such procedures, so too are revision arthroscopic hip procedures. Capsular repair in the setting of revision hip arthroscopy can be challenging due to the presence of adhesions and scar tissue formation that obscure tissue planes, suboptimal quality of residual capsular tissue, and the presence of capsular tissue defects. This technical note aims to describe the key surgical principles and considerations of revision hip capsular closure.

Background: Recent reports suggest increasing trends in injuries, primarily among pitchers and upper extremity injuries, among Major League Baseball (MLB) and Minor League Baseball (MiLB) players. Accordingly, an updated comprehensive report on injury epidemiology in professional baseball is needed. Purpose: To (1) update the literature with a comprehensive epidemiological report of all injuries in MLB and MiLB; (2) provide a detailed breakdown of characteristics of the top 50 injuries; and (3) analyze long-term trends in injuries and days missed (DM) over time. Study Design: Case Series; Level of evidence, 4. Methods: The MLB Health and Injury Tracking System was used to identify injuries in MLB and MiLB players from 2011 to 2023. The inclusion criteria consisted of injuries occurring during spring training, regular season, or postseason activities that resulted in ≥1 DM from play. Basic and advanced player and injury characteristics were analyzed—including a list of the top 50 most common injuries. Results: From 2011 to 2023, a total of 83,215 musculoskeletal injuries occurred among MLB and MiLB players, resulting in 1,280,887 total DM, with a mean (median) DM per injury of 18 (11). The upper extremity accounted for 46% of injuries, and the lower extremity for 30%. The most common injury was hamstring strains (n = 6603; 7.9%); hamate fractures had the highest rate of surgery (81%); and elbow medial ulnar collateral ligament injury resulted in the highest DM (583,070 days). From 2011 to 2023, a significant increase was observed in the number of annual injuries (excluding 2020) ( P = .028) and injuries per game ( P = .003). However, 2018 and 2019 saw the highest number of injuries, and injuries did not rise after 2020. Conclusion: The annual number of injuries and rate of injuries per game increased significantly from 2011 to 2023; however, injuries did not increase over the final 3 years of the study (2021 to 2023). The percentage of overall injuries was dominated by upper extremity injuries among pitchers, although hamstring strains were the most common injury type overall.

Background: Frequent pivoting, rotation, and deep hip flexion place football players at high risk for femoroacetabular impingement (FAI), a leading cause of hip pain in this population. Previous studies have primarily focused on professional National Football League athletes undergoing mixed surgical techniques, including labral debridement. Limited data exist on outcomes in younger, amateur players treated with labral repair. Purpose: To report return to sport (RTS) rates and functional outcomes at a minimum 5-year follow-up in primarily active high school and college football players undergoing primary hip arthroscopy with labral repair for FAI. Study Design: Case series, Level of evidence, 4. Methods: All football players who underwent primary hip arthroscopy with labral repair for FAI between 2010 and 2019 were identified from an institutional database. Collected data included descriptive data, radiographic parameters, surgical details, and reoperations. At a minimum 5-year follow-up, RTS outcomes and patient-reported outcome measures (PROMs), such as the Modified Harris Hip Score (mHHS) and Hip Outcome Score (HOS), were evaluated. Results: A total of 36 hips in 27 male athletes (mean age, 18 years; body mass index, 28.1 kg/m 2 ) were included. The majority of athletes competed at the high school (70%) or collegiate level (26%). Mean preoperative radiographic measurements were as follows: lateral center-edge angle, 31.6°; Tönnis angle, 4.1°; and alpha angle, 61.4°. Femoroplasty and acetabuloplasty were performed in 100% and 86% of cases, respectively. Also, 84% of players returned to football, all at the same or higher level than before surgery. At a mean follow-up of 9.8 years, all PROMs improved significantly from baseline ( P < .002). Outcome scores at follow-up were as follows: mHHS 90.5; HOS-Activities of Daily Living, 94.5; HOS-Sports-Specific Subscale, 91.1; and visual analog scale (VAS) pain with use, 2.3/10; VAS pain at rest, 1.3/10; and surgical satisfaction, 8.5/10. No patients required revision surgery. However, 2 patients (7%) underwent reoperations—including 1 for heterotopic ossification excision and 1 for periacetabular osteotomy. Conclusion: American football players who underwent primary hip arthroscopy with labral repair for FAI achieved excellent long-term outcomes, with high RTS rates at the same or higher levels, and improvements in PROMs and patient satisfaction. Despite favorable outcomes, nonmedical factors, such as graduation, may influence RTS in competitive athletes, particularly at the high school and collegiate levels.

Background: Arthroscopic treatment of excessive acetabular coverage with pincer morphology or coxa profunda can be challenging. In patients with excessive acetabular coverage with nondistractible hips, an outside-in capsuolotomy can be considered to gain safe and efficient intra-articular access to the hip. Indications: The indications for an outside-in capsulotomy include patients with acetabular retroversion, a lateral center-edge angle >40°, coxa profunda or protrusio, or stiff, older male patients who remain hip preservation candidates. Technique Description: The outside-in capsulotomy is performed once it is recognized that traction on the operative extremity will not provide adequate working space for safe intra-articular access. Traction is taken off the operative extremity, and an anterolateral portal is localized to the 12:00 position on the hip joint with the use of fluoroscopy. The camera is then placed in a juxta-capsular location, and a modified anterior portal is created under direct arthroscopic visualization. We then proceed with extracapsular dissection to identify the indirect head of the rectus. An outside-in capsulotomy is then performed parallel to the indirect head of the rectus, approximately 5 mm distal to its insertion on the acetabular rim. Prior to deep completion of the capsulotomy, the hip joint is flexed to 30° to protect the articular cartilage of the femoral head. Once intra-articular access is obtained, traction can be reapplied, and one can proceed with hip arthroscopy in a standard fashion. Results: This technique decreases the traction time needed, given that the capsulotomy is performed without traction applied. Additionally, the amount of force required for hip distraction is decreased once the capsuolotomy has been completed, through usual sectioning of the iliofemoral ligament. The presented technique is both safe and efficacious, with no published difference in complications as compared to standard inside-out access. A published series of patients with severe pincer morphology and lateral overcoverage who undergo hip arthroscopy with outside-in access demonstrates satisfactory postoperative improvements in patient-reported outcome measures. Discussion/Conclusion: The outside-in capsulotomy provides a means for safe access to the hip joint in otherwise limited or nondistractible hips.

Abstract Purpose Iliopsoas tendinitis following total hip arthroplasty (THA) has been described to result from acetabular component overhang as well as prominent femoral collars. Yet, a portion of patients experience iliopsoas tendinitis in the setting of well-positioned components. The purpose of this study was to assess anatomic factors predisposing to iliopsoas tendinitis after THA. Methods Patients with THAs performed at three academic institutions who subsequently underwent arthroscopic iliopsoas release were retrospectively reviewed from 2015 to 2025 and propensity matched in a 1:3 fashion to a control group of THAs without subsequent iliopsoas release. Controls were matched by age, surgery date, laterality, sex, surgical approach, and implanted femoral component. Patients with iliopsoas tendinitis and subsequent release (THA-IP) were evaluated for anterior acetabular component overhang and femoral collar overhang, when a collar was present. We also evaluated the absolute and relative profile of the lesser trochanter on anteroposterior radiographs, understanding that when less of the lesser trochanter is visualized, the trochanter is anatomically displaced posterolaterally, resulting in a more arduous route from the inner pelvic origin of the iliopsoas to its insertion on the femur. Results Forty-five patients (mean age: 57±11; 71% female; 19 direct anterior, 10 anterolateral, 16 posterior approach) undergoing THA-IP were analyzed and matched to 135 controls. Both groups demonstrated a median cup size of 54 mm and head size of 36 mm. Average time to iliopsoas release after THA was 4 years. Anterior cup overhang of &gt;2 mm was present in 49% of THA-IP patients, with 18% having collared femoral components, and 9% demonstrating collar overhang of &gt;2 mm. Overall, 19 THA-IP patients had &lt;2 mm of cup and collar overhang and 26 patients had &gt;2 mm of overhang. THA-IP patients with &lt;2 mm of cup and collar overhang had significantly greater relative posterolateralization of the lesser trochanter compared to those with overhang of &gt;2 mm (p=0.010) and to controls (p=0.037). Conclusion Visualizing “Less of the Lesser” on anteroposterior hip radiographs and associated posterolateralization of the lesser trochanter may be an anatomic risk factor for iliopsoas tendinitis following THA, even in the presence of satisfactorily positioned components.

Abstract Purpose To investigate clinical outcomes, including patient reported outcome measures (PROMs), subjective anterior groin pain and hip flexion strength, and reoperation rates following arthroscopic iliopsoas fractional lengthening after total hip arthroplasty (THA). Methods Patients who were indicated for arthroscopic iliopsoas fractional lengthening after ipsilateral THA were prospectively identified between 2023-2025 at a single institution. Pre- and post-operative PROMs, including Visual Analog Scale (VAS), Tegner activity scale, Single Assessment Numeric Evaluation (SANE), and subjective anterior groin pain and hip flexion strength were analyzed. Reoperations at final follow-up were also evaluated. Results A total of 44 hips in 41 patients (23 females and 18 males) were included (mean age: 64.7 ± 10.2, mean BMI: 29.9 ± 5.9 kg/m2). Fifty-five percent of patients underwent surgery on their right hip. The mean postoperative follow-up timeframe was 10.0 ± 7.1 months. There was a significant improvement in postoperative PROMs compared to pre-operative levels for VAS at rest (1.3 ± 1.9 vs. 2.9 ± 2.2), VAS with use (3.1 ± 3.8 vs. 8.0 ± 1.6), Tegner activity scale (2.9 ± 1.3 vs. 2.1 ± 1.1), and SANE (74.0 ± 20.3 vs. 47.9 ± 23.4) (p&lt;0.001 for all). Over 90% of patients reported feeling much better or slightly better regarding their anterior groin pain at 2-weeks post-operatively (93%), 6 weeks post-operatively (90%), 3 months post-operatively (93%), and at final follow-up (91%). Regarding hip flexion strength, 73% reported feeling much better or slightly better at 2-weeks post-operatively, 95% at 6-weeks post-operatively, 85% at 3 months post-operatively, and 61% at final follow-up. Only 2 patients (5%) reported feeling much weaker at final follow-up. Two of 44 hips (5%) underwent reoperation at final follow-up. One patient underwent a 2-stage revision THA at 5 months postoperatively due to infection, while 1 patient underwent an open iliopsoas release with acetabular screw removal and liner exchange. Overall, the mean surgery satisfaction was 8.1 ± 2.6 on a scale of 1-10. Conclusion Patients who underwent arthroscopic iliopsoas fractional lengthening following THA demonstrated satisfactory postoperative outcomes, with over 90% reporting durably improved anterior groin pain and nearly two-thirds reporting increased hip flexor strength throughout follow-up.

Background: Femoroacetabular impingement (FAI) is a common cause of hip pain in female athletes. There are limited data on midterm outcomes for female athletes undergoing hip arthroscopic surgery. Purpose: To evaluate return-to-sport rates and clinical outcomes in female athletes with FAI after primary hip arthroscopic surgery with labral repair and femoral osteochondroplasty. Study Design: Case series; Level of evidence, 4. Methods: A retrospective analysis of a single institution’s database was performed to identify female athletes who underwent primary hip arthroscopic surgery with labral repair and femoral osteochondroplasty from July 2011 to October 2019 with a minimum 5-year follow-up. Preoperative radiographs were evaluated for the lateral center-edge angle, Tonnis angle, Tonnis grade, and alpha angle. Patient-reported outcome measure (PROM) scores, including those for the modified Harris Hip Score, Hip Outcome Score, Tegner Activity Scale, and visual analog scale for pain, as well as patient satisfaction with surgery were analyzed postoperatively. Results: A total of 63 hips (27 left, 36 right) in 56 female patients (mean age, 21.6 ± 8.0 years; mean body mass index, 24.7 ± 4.8 kg/m 2 ) were included and followed for a mean of 8.4 ± 2.1 years (range, 5.0-13.2 years). Preoperatively, patients participated in basketball (n = 18), dance (n = 21), hockey (n = 8), and soccer (n = 12). Of the 56 patients, 41 attempted to return to sport. There were 28 (68%) female athletes who successfully returned to their preoperative sport. Of the total cohort, 21 (38%) patients cited non–hip-related factors for discontinuing their sport. All postoperative PROM scores improved significantly compared with preoperatively ( P ≤ .002) for patients with available preoperative data. Those who returned to sport had significantly improved Hip Outcome Score values compared with those who did not return to sport ( P ≤ .010). Conclusion: Female athletes who underwent primary hip arthroscopic surgery for FAI had significant improvements in PROM scores and moderate return-to-sport rates at a minimum 5-year follow-up. Most athletes discontinued sports because of non–hip-related factors, although hip-related issues were also cited. Our analysis highlights the need for thorough perioperative counseling and establishing appropriate patient expectations for female athletes before hip arthroscopic surgery.