AMAllison M. Morgan

Allison M. Morgan

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Allison M. Morgan has a total of 43 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Editorial Commentary : Arthroscopic Bony Bankart Fixation Stands the Test of Time—Preserve Native Glenoid Anatomy When You Can!

    by Allison M. Morgan, Peter J. Millett

    Bony Bankart lesions provide an opportunity to restore native glenoid anatomy through direct fragment fixation. Arthroscopic bony Bankart repair can provide long‐term shoulder stability, high patient satisfaction, and sustained participation in sport. Although we prefer double‐row bridge fixation for its broad compression across the fracture bed, rotational control, and biomechanically stronger fixation, a properly indicated and well‐executed single‐row repair can achieve excellent results. Latarjet and other glenoid bone‐augmentation procedures remain important options for patients with attritional or irreparable bone loss and high‐risk bipolar lesions. However, increasing enthusiasm for these procedures should not displace anatomic repair when a viable bony Bankart fragment can be mobilized, anatomically reduced, and securely fixed. When native glenoid anatomy can be reliably restored, arthroscopic bony Bankart fixation is an effective and durable treatment.

  • Patients with prior hip arthroscopy have worse outcomes after hip resurfacing arthroplasty: a matched cohort study

    by Allison M. Morgan, Zachary I. Li, Christopher A. Colasanti, Michele Cerasani, Jacob E. Milner, Thomas Youm, Scott E. Marwin

    Purpose This study compares PROMs between patients who underwent hip arthroscopy prior to hip resurfacing arthroplasty (HRA) to a matched cohort of HRA patients without prior arthroscopy. Methods A retrospective cohort study was performed of patients who underwent a HRA from 2016 to 2021 with minimum 2-year follow-up. Patients with prior arthroscopy were matched 1:3 with controls on age, sex, BMI, and ASA classification. Subjects completed HOOS JR, FJS, SANE, and PROMIS for physical function, pain intensity, and pain interference. The Mann-Whitney U test was used for intergroup mean comparisons and Fisher’s exact test for categorical variables. Results 20 patients with prior hip arthroscopy were matched to 60 controls (mean age: 47.1 ± 7.2 years; BMI: 29.5 ± 4.2, 96% male). Patients who underwent hip arthroscopy prior to HRA reported significantly greater pain (33.8 vs. 13.2, p = 0.011), poorer FJS (46.6 vs. 70.5, p = 0.030), physical function (43.7 vs. 50.9, p = 0.018), SANE rating (59.9 vs. 82.6, p = 0.005), and satisfaction (66.1 vs. 88.1, p = 0.006) after HRA. 11 patients (55.0%) stated that their hip resurfacing procedure met their expectations compared to 52 patients (86.7%) in the control group. Conclusions Patients who underwent hip arthroscopy prior to HRA have an association with significantly worse patient-reported outcome metrics, poor postoperative satisfaction, and higher postoperative pain.

  • The Relationship Between the Lumbopelvic Spine and Hip in Femoroacetabular Impingement Patients

    by Jacob E. Milner, Allison Morgan, Jahnya Brown, Jonathan Westafer, Thomas Youm, Daniel J. Kaplan

    Purpose Though Femoroacetabular impingement (FAI) is thought of as primarily a hip condition an increasing body of evidence has demonstrated the existence of a relationship between the hip joint and lumbopelvic spine, termed the hip-spine syndrome (HSS). This review will provide an overview of the relevant pelvic parameters, proper HSS patient evaluation, describe how lumbar pathology may mechanistically affect the hip, provide a literature review of biomechanic and outcome papers exploring the subject, and finally investigate potential interventions that can be considered in these challenging patients. Recent Findings Deviations from normal ranges in pelvic parameters have been shown in biomechanical studies to worsen FAI by decreasing the range of impingement free motion. The clinical relevance of this is still being determined. Patients with concomitant lumbar spine pathology may significantly improve after hip arthroscopy, though they may have a lower ceiling than comparable patients without lumbar spine pathology. Summary Surgeons and patients should be aware of the HSS. Alterations in pelvic parameters may affect outcomes, though this still has to be determined. Patients with lumbar spine pathology and FAI can still be treated successfully with hip arthroscopy, though should be counseled appropriately.


  • Chondroplasty for isolated medial patellar facet cartilage lesions demonstrates no difference in clinical outcomes compared to a matched cohort of patients without patellofemoral chondral pathology in the setting of medial patellofemoral ligament reconstruction

    by Sharif Garra, Zachary I. Li, Allison M. Morgan, Andrew J. Hughes, Luilly Vargas, Laith M. Jazrawi, Eric J. Strauss

    Purpose To determine whether chondroplasty for isolated medial patellar facet lesions produces similar clinical outcomes compared to patients without patellofemoral cartilage lesions in the setting of medial patellofemoral ligament (MPFL) reconstruction for patellar instability. Methods We retrospectively identified patients who underwent MPFL reconstruction with or without tibial tubercle osteotomy (TTO) from 2015 to 2020 with minimum 2-year follow-up. Operative reports detailed patellofemoral articular surfaces and Outerbridge grade. Exclusion criteria were: prior knee surgery, multiple lesions, concomitant cartilage repair, trochleoplasty, or meniscus repair. Patients with isolated medial facet lesions (case) were propensity matched to patients without patellofemoral cartilage injury (control) by age, sex, BMI, and concomitant TTO. Clinical outcomes were evaluated using the Kujala score, Tegner activity scale, and the Visual Analog Score (VAS) for pain. Results Of 79 eligible patients, 59 (74.7%) completed all surveys, and 40 patients (8 M and 32 F) were matched 1:1 with mean 4.1-year (range: 2.1–8.5) follow-up, including 20 patients with medial facet lesions (5 grade II, 6 grade III, and 9 grade IV). There were no significant differences between groups with respect to Kujala score (85.2 vs 84.6, p = 0.906), Tegner (5.7 ± 2.6 vs 4.9 ± 3.0, p = 0.924), or VAS pain score (12.4 ± 20.1 vs 16.5 ± 23.9, p = 0.718). Chondral lesion size at the index procedure was not significantly correlated with pain (R = − 0.06, p = 0.816) or Kujala score (R = − 0.67, p = 0.779). Conclusion Chondroplasty for isolated medial patellar facet lesions led to similar clinical outcomes to patients with intact patellofemoral articular cartilage at a minimum of 2 years following MPFL reconstruction. These findings support conservative management of isolated medial facet lesions without need for cartilage restoration procedures. Level of evidence III Retrospective comparative cohort study.


  • Pain worsens peripartum after hip arthroscopy for femoroacetabular impingement and may not return to pre-pregnancy improvement

    by Allison M. Morgan, Dhruv S. Shankar, Andrew S. Bi, Zachary I. Li, Jairo Triana, Thomas Youm


  • A high proportion of patients demonstrate recall bias in the retrospective collection of patient‐reported outcomes following hip arthroscopy

    by Allison M. Morgan, Jairo Triana, Zachary I. Li, Melissa Song, Nicole D. Rynecki, Sharif Garra, Thomas Youm

    Purpose: The aim of this study is to assess agreement between retrospectively and prospectively collected patient‐reported outcome measures (PROMs) following hip arthroscopy for femoroacetabular impingement syndrome (FAIS).Methods: Patients undergoing hip arthroscopy from 2021 to 2023 for FAIS completed preoperative PROMs, including the modified Harris Hip Score (mHHS) and the Non‐Arthritic Hip Score (NAHS). Post‐operatively, patients were surveyed and asked to recall their preoperative hip function. Paired two‐sample t tests were used to compare baseline and recalled baseline PROMs and the difference between scores was compared to previously published minimally clinically important difference (MCID) values. Intraclass correlation coefficients (ICCs) were calculated to test the reliability between scores based on a single‐rater, two‐way mixed‐effects model. Multivariable regression, accounting for age, sex and preoperative baseline scores, was used to evaluate the relationship of time elapsed since surgery with recall accuracy.Results: A total of 116 patients (age: 37.6 ± 11.8 years; 61.2% female) were included. The mean time elapsed for recalled data was 13.1 months (range: 1–27 months). Overall, patients' recalled scores were significantly lower than those prospectively collected (mHHS: 52.9 ± 20.1 vs. 61.5 ± 18.5, p < 0.0001; NAHS: 54.7 ± 20.0 vs. 58.8 ± 19.1, p < 0.0001). Frequency distribution found 68.1% of recalled mHHS and 61.2% of NAHS scores to have a greater difference (between baseline and recalled scores) than the MCID. The ICC was moderate for both mHHS (ICC = 0.559, 95% confidence interval [CI] = [0.420‐0.672], p < 0.001) and NAHS (ICC = 0.612, 95% CI = [0.484–0.714], p < 0.001). Multivariate regression analysis did not find time elapsed since surgery to be associated with the difference between baseline and recalled mHHS (n.s.) or NAHS (n.s.).Conclusion: There are significant differences between retrospective and prospectively collected PROMs in patients undergoing hip arthroscopy that are not predicted by time to recall. These findings should impact the interpretation of the existing literature, support the routine collection of prospective data and inform patient counsel regarding their perceived post‐operative outcomes.Level of Evidence: Level IV.


  • Surgical Treatment and Outcomes for Gluteal Tendon Tears

    by Allison Morgan, Michael Moore, Kendall Derry, Andrew Bi, Jahnya Brown, Thomas Youm, Daniel Kaplan

    Purpose of Review Gluteus medius and minimus tears, or hip abductor tendon tears, are increasingly identified as a source of lateral hip pain. Once underappreciated and undertreated, they are now recognized as a cause of greater trochanteric pain syndrome and a pathology amenable to both nonoperative and operative modalities. This review summarizes relevant anatomy, clinical presentation, and treatment options for gluteus medius tears, focusing on surgical options. Recent Findings When surgical intervention is indicated, repair, reconstruction, or tendon transfer may be considered. Open and endoscopic repair techniques demonstrate similar outcomes with improvements in patient-reported outcomes and low complication and retear rates for both partial and full thickness tears. Variations in fixation construct and graft augmentations have been described, though clinical evidence remains limited to support specific techniques. Gluteus maximus transfer via open approach is a salvage option for the severely atrophied, retracted, or revision gluteus tendon; however, persistent limitations in abduction strength and gait abnormalities are common. Summary Emerging evidence continues to evolve our understanding of surgical decision-making for gluteus tendon tears. The current literature supports either open or endoscopic repair techniques and open tendon transfer as a salvAage option. Further study is needed to determine the optimal fixation construct, the role of graft augmentation, and patient-related factors that influence postoperative outcomes.


  • Patient-reported allergies are associated with increased rate of postoperative stiffness after arthroscopic rotator cuff repair

    by Allison M. Morgan, Zachary I. Li, Sharif Garra, Andrew S. Bi, Guillem Gonzalez-Lomas, Laith M. Jazrawi, Kirk A. Campbell


  • Open Access

    Outcomes of Hip Arthroscopy in Patients with Systemic Inflammatory Diseases: A Matched Cohort 5-Year Follow-Up Study

    by Nicole D. Rynecki, Dhruv S. Shankar, Allison M. Morgan, Shalen Kouk, Thomas Youm

    The purpose of this study was to determine if there is a difference in hip survivorship rates and patient-reported outcomes (PROs) at a 5-year follow-up after arthroscopic treatment of femoroacetabular impingement syndrome (FAIS) between patients with versus without systemic inflammatory diseases (SIDs). A retrospective single-surgeon matched cohort study of FAIS patients who underwent hip arthroscopy and had a minimum of a 5-year follow-up was conducted. Subjects with SIDs were matched at a ratio of 2:3 of age and body mass index (BMI) with respect to controls without SIDs. Subjects completed the modified Harris Hip Score (mHHS) and Non-Arthritic Hip Score (NAHS) prior to surgery and at a 2-year and 5-year follow-up. Survival distributions for time to reoperation and to total hip arthroplasty (THA) were compared between groups using the log-rank test. Fifteen subjects with SIDs (mean age 41.5 years) were matched with twenty-five controls (41.8 years). There were no significant differences in reoperation rates (SIDs 27% vs. controls 20%, p = 0.71) or THA conversion rates (SIDs 7% vs. controls 12%, p = 1.00) at the 5-year follow-up, nor were there differences in survival distributions for reoperations (p = 0.72) or THAs (p = 0.55). There were no significant differences in postoperative mHHS (SIDs 79.3 vs. controls 88.5, p = 0.09) or NAHS (SIDs 82.7 vs. controls 89.3, p = 0.77) by the 5-year follow-up. At the 5-year follow-up, FAIS patients with comorbid SIDs experienced a significant clinical improvement from hip arthroscopy that is comparable to that of FAIS patients without SIDs.