Purpose: This study sought to assess the long-term structural integrity of primary anterior cruciate ligament (ACL) reconstructions using Achilles tendon allografts by measuring the side-to-side difference in anterior-posterior tibial translation between the operative knee and the contralateral, asymptomatic knee. Methods: This study was a retrospective case series consisting of patients who underwent primary ACL reconstruction with Achilles tendon allograft. Allografts were chemically processed using the AlloWash or AlloTrue methods and then received either gamma radiation or electron beam radiation (range: 0.95 to 1.4 Mrad dose). At the time of follow-up, anterior-posterior tibial translation of both the operative and contralateral knees was measured using the Lachmeter� device. Functional outcomes were assessed using the International Knee Documentation Committee (IKDC) questionnaire and the Knee Injury and Osteoarthritis Outcome Score (KOOS) questionnaire. Results: The analysis included 20 patients (mean age: 41.38 � 14.27 years) with a mean follow-up time of 7.01 ± 5.24 years. There were no graft failures requiring revision during the study period. The mean side-to-side difference in laxity between operative and contralateral knees was 1.10 ± 2.02 mm. Two patients (10%) met the criteria for complete ACL injury at the time of follow-up, while the remaining 18 patients (90%) met the criteria for no ACL injury. The mean IKDC score was 83.5 ± 13.8, and mean KOOS score was 88.4 � 10.7. Conclusions: Primary ACL reconstruction using an Achilles tendon allograft in skeletally mature patients resulted in maintained knee stability and good functional outcomes over the long-term postoperative period.

Computer assisted surgical (CAS) navigation and robotic-assisted total hip arthroplasty (THA) have the potential to improve the reproducibility of accurate component positioning and facilitate complex cases, including revision and preoperative deformity. Numerous studies, including multiple comparing technology with conventional THA control groups, suggest that CAS navigation may improve component accuracy in cases of deformity such as hip dysplasia and significant leg length discrepancy. Revision THA data is also encouraging but limited. The functional benefits compared to conventional techniques remain unclear. The evidence for robot-assisted THA in complex cases is more limited but also demonstrates utility. For complex cases, studies comparing results with conventional THA are not yet available. The limitations of these systems, including cost, operative time, learning curves, and possible complications, require further study. The available data for CAS navigation and robotic-assisted THA indicates that they may play a role in complex deformity and revision cases. Further high-quality randomized studies should be undertaken.

Traumatic extremity amputation can be devastating for patients' functional and psychological health. Challenges of initial management and considerations for limb salvage versus amputation for mangled lower extremities are well documented. However, literature geared toward orthopedic surgeons highlighting management considerations for the residual limb of an amputation is scarce. This article reviews recent literature on management of the residual limb in the perioperative and rehabilitation phases of treatment.

Purpose: Thisstudy sought to assessthe prognostic effect of preoperative symptom severity on hip arthroscopy outcomes for femoroacetabular impingement syndrome (FAI). Methods: Patients undergoing hip arthroscopy between September 2012 and July 2014 for FAI with a minimum of 5-year clinical outcomes were compiled. Patient reported outcomes (PROs) including modified Harris Hip Score (mHHS) and Nonarthritic Hip Score (NAHS) were collected. High and low preoperative function (PF) subgroups were created using baseline population median mHHS (43.3) as a threshold with PROs below the median score indicating low preoperative function and vice versa for scores above the median. Kaplan-Meier analysis, Cox proportional modeling, analysis of variance (ANOVA), and linear regressions were used for analysis. Results: One hundred five of 131 eligible patients(80.2% inclusion; age: 42.6 ± 1.4 years; body mass index: 25.3 ± 0.4 kg/m2 ) met the study criteria. The 5-year survival-torevision rate (85% versus 61%, p = 0.013) and survivalto-arthroplasty rate (95% vs. 82%, p = 0.022) were greater in the high versus low PF group. ANOVA demonstrated the high versus low PF group had higher baseline (mHHS: 52.7 ± 1.4 vs. 36.1 ± 1.1, p < 0.001; NAHS: 57.4 ± 1.6 vs. 39.3 ± 1.2, p < 0.001) and 1-year (mHHS: 91.9 ± 1.8 vs. 79.5 ± 2.7, p < 0.001; NAHS: 91.7 ± 1.6 vs. 80.8 ± 2.5, p < 0.001) outcomes. High versus low PF achieved higher Minimal Clinically Important Difference (77% vs. 57%, p = 0.026) at 5-years. High versus low PF achieved higher Patient Acceptable Symptomatic State rates at 1 year (79% vs. 47%, p < 0.001) and 5 years (66% vs. 45%, p = 0.032). Linear regression demonstrated body mass index (mHHS: p = 0.002; NAHS: p = 0.005), pincer resection (mHHS: p = 0.046), and preoperative symptom severity (mHHS: p = 0.001; NAHS: p = 0.002) to be predictors of 5-year change in PROs. Conclusion: Preoperative symptom severity is a reliable prognostic indicator of clinical survival rates and PROs after hip arthroscopy for FAI. Subjects with high PF are likely to have increased longevity of the index procedure while maintaining excellent PASS and MCID rates mid-term as opposed to those with low PF.

Background: Deep surgical site infections (dSSI) following total knee arthroplasty (TKA) are associated with morbidity and poor outcomes. Although numerous patient and non-patient factors have been correlated with dSSI development, the temporal and seasonal variability of dSSI is unclear. The purpose of this study was to investigate the monthly and seasonal variability of dSSI rates following TKA. Methods: The dSSI database at a single large, urban, academic medical center was reviewed for TKAs performed between January 2009 and August 2018. The monthly and seasonal variability of dSSI was evaluated using a Poisson regression. Additionally, the change in dSSI rate was calculated over the entire study period. Results: We reviewed 15,230 consecutive TKAs. The average dSSI rate following TKA was 1.11% (SD: 0.91). The rate of dSSI decreased over the study period (r = 0.94, 95% CI: 0.85-1.05) but did not reach statistical significance. With summer as the reference season, there were no significant differences in the dSSI rate in fall, winter, or spring. With July as the reference season, there were no differences in the dSSI rate in any other months of the year. Conclusion: Although non-significant, this analysis found a decreasing rate of dSSI after TKA over a nearly 10-year period. Interestingly, there was no difference in the dSSI rate following TKA in July as compared to other months or in summer as compared to other seasons. This conflicts with previous reports that have found an increased incidence of dSSI and other complications in July when the graduate medical education calendar begins.

Objective: Resection of soft tissue sarcoma (STS) in the distal lower extremity can result in large soft tissue defects that create difficult wounds to manage and significant risks for complications. Often, the anticipated or resultant tissue defect or loss of functional anatomy is an indication for amputation over limb salvage. Soft tissue reconstruction managed by plastic and reconstructive surgery (PRS) may help offer limb salvage as a therapeutic option with acceptable oncologic outcomes and wound complication rates. Methods: This was a review of 52 patients who underwent resection of STS at the level of the knee or distal between 2010 and 2020. Plastic and reconstructive surgery soft tissue management was utilized in 40.4% (n = 21) of cases, most of whom would have otherwise been considered candidates for amputation. Results: The overall rate of limb salvage was 76.9%. The overall rate of wound complications was 19.2%. The overall rate of negative margins of resection was 92.3%. The 1-, 5-, and 10-year overall survival probabilities were 92%, 85%, and 85%, respectively. Of the 40 limb salvage procedures, two required subsequent amputation, one for multiply recurrent disease and one for necrosis. The wound complication rate was 14.3% in the PRS management group and 22.6% in cases of wound closure managed by the primary surgeon. There were zero instances of total wound or flap loss in PRS- managed closures. When comparing patients with wound complications to those without, there was no difference in age (59.5 ± 21 vs. 51 ± 18 years, p = 0.42), body mass index (31.1 ± 4.8 vs. 26.1 ± 7.1 kg/m2 , p = 0.19), or tumor size (6.8 ± 5.0 vs. 6.4 ± 4.7 cm, p = 0.82). At final follow-up, 67% (n = 35) of patients were alive and disease-free. Conclusions: Wound complications are not uncommon after resection of distal lower extremity STS. Our experience has been successful in achieving limb salvage in these challenging cases. Without PRS soft tissue management, however, many patients may alternatively be candidates for amputation.

Purpose: The use of intraoperative technology is increasing among orthopedic surgeons in the United States. However, there is continued debate as to whether intraoperative technologies provide clinical benefits in patients undergoing total knee arthroplasty (TKA). This study sought to determine whether the use of a novel intraoperative navigation technology produces equivalent or superior short-term outcomes compared to conventional technique. Methods: Fifty-nine consecutive patients underwent primary TKA with a novel imageless intraoperative navigational technology between October 2019 and January 2020 at a single, urban, orthopedic specialty hospital. A 1:1 cohort propensity matching was performed with patients with similar demographics who underwent primary TKA without the use of technology. Demographics, clinical data, as well as preoperative and 3-month Knee Injury and Osteoarthritis Outcome Score, Joint Replacement (KOOS, JR) scores were collected. Demographic differences, clinical data, and mean KOOS, JR scores were assessed using chi-squared analysis for categorical variables and independent sample t-test for continuous variables. Results: Upon 1:1 cohort matching, patients in both the navigational cohorts and non-navigational cohorts were statistically similar demographically. Length of stay (2.11 vs. 1.71 days; p = 0.108), surgical time (108.89 vs. 101.19 minutes, p = 0.066), discharge disposition (p = 0.675), 90- day readmissions (4 vs. 4, p = 0.999), and 90-day reoperations (2 vs. 2, p = 0.999) did not statistically differ between the two matched cohorts. Additionally, KOOS, JR scores evaluated between the two cohorts preoperatively (46.06 vs. 45.17, p = 0.836) and at 3-month follow-up (57.63 vs. 55.06, p = 0.580) were similar. Conclusion: This study demonstrates that the use of this novel intraoperative navigational technology yields similar short-term TKA results when compared to conventionally performed TKA. Further studies are required to validate new technologies and determine their effect on long-term clinical and patient-reported outcomes.

Purpose: The purpose of this study was to systematically review the evidence in the literature in order to evaluate the outcomes following medial patellofemoral ligament (MPFL) reconstruction with allograft compared to autograft reconstruction. Methods: A systematic literature search was performed based on PRISMA guidelines using the EMBASE, MEDLINE, and The Cochrane Library databases. Inclusion criteria for the study was clinical studies reporting on MPFL reconstruction with allograft. Recurrence rate, complications, rate of return-to-play, and functional outcomes including the Kujala, Tegner, and visual analog scale (VAS) scores were evaluated. Statistical analysis was performed using GraphPad Prism 8.3. Results: Our review identified 12 studies with a total of 336 patient knees meeting the inclusion criteria. The majority of patients were female (61.6%), with a mean age of 22.3 years and a mean follow-up of 43.4 months. The overall rate of recurrence of lateral patellar instability was 2.7% in the allograft cohort as compared to 7.8% in the autograft cohort (p = 0.01). The mean Kujala score was 91.8%, and the mean VAS score was 1.3 at final follow-up. Additionally, 81.5% of patients were able to return to play in the studies reporting this outcome measure. The overall complication rate was 1.4%. Conclusion: The overall rate of recurrence was lower following MPFL reconstruction with allograft as compared to autograft in the treatment of lateral patellar instability. Additionally, there were excellent patient reported outcomes and a low complication rate following the use of allograft for MPFL reconstructionPurpose: The purpose of this study was to systematically review the evidence in the literature in order to evaluate the outcomes following medial patellofemoral ligament (MPFL) reconstruction with allograft compared to autograft reconstruction. Methods: A systematic literature search was performed based on PRISMA guidelines using the EMBASE, MEDLINE, and The Cochrane Library databases. Inclusion criteria for the study was clinical studies reporting on MPFL reconstruction with allograft. Recurrence rate, complications, rate of return-to-play, and functional outcomes including the Kujala, Tegner, and visual analog scale (VAS) scores were evaluated. Statistical analysis was performed using GraphPad Prism 8.3. Results: Our review identified 12 studies with a total of 336 patient knees meeting the inclusion criteria. The majority of patients were female (61.6%), with a mean age of 22.3 years and a mean follow-up of 43.4 months. The overall rate of recurrence of lateral patellar instability was 2.7% in the allograft cohort as compared to 7.8% in the autograft cohort (p = 0.01). The mean Kujala score was 91.8%, and the mean VAS score was 1.3 at final follow-up. Additionally, 81.5% of patients were able to return to play in the studies reporting this outcome measure. The overall complication rate was 1.4%. Conclusion: The overall rate of recurrence was lower following MPFL reconstruction with allograft as compared to autograft in the treatment of lateral patellar instability. Additionally, there were excellent patient reported outcomes and a low complication rate following the use of allograft for MPFL reconstruction

A 50-year-old woman developed severe soft tissue atrophy of the hip following a triamincolone acetonide injection to the greater trochanteric bursa. Saline injection therapy was initially attempted without improvement and the defect was ultimately treated effectively with serial fat grafting. Adverse soft tissue reactions are rare but potentially devastating complications of corticosteroid injections, and the use of soluble steroid preparations and proper injection techniques can minimize the risk to surrounding tissue. Serial fat grafting represents a promising treatment option for severe cases of steroid-induced soft tissue atrophy.

Purpose: This study sought to assess the long-term structural integrity of primary anterior cruciate ligament (ACL) reconstructions using Achilles tendon allografts by measuring the side-to-side difference in anterior-posterior tibial translation between the operative knee and the contralateral, asymptomatic knee. Methods: This study was a retrospective case series consisting of patients who underwent primary ACL reconstruction with Achilles tendon allograft. Allografts were chemically processed using the AlloWash or AlloTrue methods and then received either gamma radiation or electron beam radiation (range: 0.95 to 1.4 Mrad dose). At the time of follow-up, anterior-posterior tibial translation of both the operative and contralateral knees was measured using the Lachmeter� device. Functional outcomes were assessed using the International Knee Documentation Committee (IKDC) questionnaire and the Knee Injury and Osteoarthritis Outcome Score (KOOS) questionnaire. Results: The analysis included 20 patients (mean age: 41.38 � 14.27 years) with a mean follow-up time of 7.01 ± 5.24 years. There were no graft failures requiring revision during the study period. The mean side-to-side difference in laxity between operative and contralateral knees was 1.10 ± 2.02 mm. Two patients (10%) met the criteria for complete ACL injury at the time of follow-up, while the remaining 18 patients (90%) met the criteria for no ACL injury. The mean IKDC score was 83.5 ± 13.8, and mean KOOS score was 88.4 � 10.7. Conclusions: Primary ACL reconstruction using an Achilles tendon allograft in skeletally mature patients resulted in maintained knee stability and good functional outcomes over the long-term postoperative period.

Computer assisted surgical (CAS) navigation and robotic-assisted total hip arthroplasty (THA) have the potential to improve the reproducibility of accurate component positioning and facilitate complex cases, including revision and preoperative deformity. Numerous studies, including multiple comparing technology with conventional THA control groups, suggest that CAS navigation may improve component accuracy in cases of deformity such as hip dysplasia and significant leg length discrepancy. Revision THA data is also encouraging but limited. The functional benefits compared to conventional techniques remain unclear. The evidence for robot-assisted THA in complex cases is more limited but also demonstrates utility. For complex cases, studies comparing results with conventional THA are not yet available. The limitations of these systems, including cost, operative time, learning curves, and possible complications, require further study. The available data for CAS navigation and robotic-assisted THA indicates that they may play a role in complex deformity and revision cases. Further high-quality randomized studies should be undertaken.

Traumatic extremity amputation can be devastating for patients' functional and psychological health. Challenges of initial management and considerations for limb salvage versus amputation for mangled lower extremities are well documented. However, literature geared toward orthopedic surgeons highlighting management considerations for the residual limb of an amputation is scarce. This article reviews recent literature on management of the residual limb in the perioperative and rehabilitation phases of treatment.

Purpose: Thisstudy sought to assessthe prognostic effect of preoperative symptom severity on hip arthroscopy outcomes for femoroacetabular impingement syndrome (FAI). Methods: Patients undergoing hip arthroscopy between September 2012 and July 2014 for FAI with a minimum of 5-year clinical outcomes were compiled. Patient reported outcomes (PROs) including modified Harris Hip Score (mHHS) and Nonarthritic Hip Score (NAHS) were collected. High and low preoperative function (PF) subgroups were created using baseline population median mHHS (43.3) as a threshold with PROs below the median score indicating low preoperative function and vice versa for scores above the median. Kaplan-Meier analysis, Cox proportional modeling, analysis of variance (ANOVA), and linear regressions were used for analysis. Results: One hundred five of 131 eligible patients(80.2% inclusion; age: 42.6 ± 1.4 years; body mass index: 25.3 ± 0.4 kg/m2 ) met the study criteria. The 5-year survival-torevision rate (85% versus 61%, p = 0.013) and survivalto-arthroplasty rate (95% vs. 82%, p = 0.022) were greater in the high versus low PF group. ANOVA demonstrated the high versus low PF group had higher baseline (mHHS: 52.7 ± 1.4 vs. 36.1 ± 1.1, p < 0.001; NAHS: 57.4 ± 1.6 vs. 39.3 ± 1.2, p < 0.001) and 1-year (mHHS: 91.9 ± 1.8 vs. 79.5 ± 2.7, p < 0.001; NAHS: 91.7 ± 1.6 vs. 80.8 ± 2.5, p < 0.001) outcomes. High versus low PF achieved higher Minimal Clinically Important Difference (77% vs. 57%, p = 0.026) at 5-years. High versus low PF achieved higher Patient Acceptable Symptomatic State rates at 1 year (79% vs. 47%, p < 0.001) and 5 years (66% vs. 45%, p = 0.032). Linear regression demonstrated body mass index (mHHS: p = 0.002; NAHS: p = 0.005), pincer resection (mHHS: p = 0.046), and preoperative symptom severity (mHHS: p = 0.001; NAHS: p = 0.002) to be predictors of 5-year change in PROs. Conclusion: Preoperative symptom severity is a reliable prognostic indicator of clinical survival rates and PROs after hip arthroscopy for FAI. Subjects with high PF are likely to have increased longevity of the index procedure while maintaining excellent PASS and MCID rates mid-term as opposed to those with low PF.

Background: Deep surgical site infections (dSSI) following total knee arthroplasty (TKA) are associated with morbidity and poor outcomes. Although numerous patient and non-patient factors have been correlated with dSSI development, the temporal and seasonal variability of dSSI is unclear. The purpose of this study was to investigate the monthly and seasonal variability of dSSI rates following TKA. Methods: The dSSI database at a single large, urban, academic medical center was reviewed for TKAs performed between January 2009 and August 2018. The monthly and seasonal variability of dSSI was evaluated using a Poisson regression. Additionally, the change in dSSI rate was calculated over the entire study period. Results: We reviewed 15,230 consecutive TKAs. The average dSSI rate following TKA was 1.11% (SD: 0.91). The rate of dSSI decreased over the study period (r = 0.94, 95% CI: 0.85-1.05) but did not reach statistical significance. With summer as the reference season, there were no significant differences in the dSSI rate in fall, winter, or spring. With July as the reference season, there were no differences in the dSSI rate in any other months of the year. Conclusion: Although non-significant, this analysis found a decreasing rate of dSSI after TKA over a nearly 10-year period. Interestingly, there was no difference in the dSSI rate following TKA in July as compared to other months or in summer as compared to other seasons. This conflicts with previous reports that have found an increased incidence of dSSI and other complications in July when the graduate medical education calendar begins.

Objective: Resection of soft tissue sarcoma (STS) in the distal lower extremity can result in large soft tissue defects that create difficult wounds to manage and significant risks for complications. Often, the anticipated or resultant tissue defect or loss of functional anatomy is an indication for amputation over limb salvage. Soft tissue reconstruction managed by plastic and reconstructive surgery (PRS) may help offer limb salvage as a therapeutic option with acceptable oncologic outcomes and wound complication rates. Methods: This was a review of 52 patients who underwent resection of STS at the level of the knee or distal between 2010 and 2020. Plastic and reconstructive surgery soft tissue management was utilized in 40.4% (n = 21) of cases, most of whom would have otherwise been considered candidates for amputation. Results: The overall rate of limb salvage was 76.9%. The overall rate of wound complications was 19.2%. The overall rate of negative margins of resection was 92.3%. The 1-, 5-, and 10-year overall survival probabilities were 92%, 85%, and 85%, respectively. Of the 40 limb salvage procedures, two required subsequent amputation, one for multiply recurrent disease and one for necrosis. The wound complication rate was 14.3% in the PRS management group and 22.6% in cases of wound closure managed by the primary surgeon. There were zero instances of total wound or flap loss in PRS- managed closures. When comparing patients with wound complications to those without, there was no difference in age (59.5 ± 21 vs. 51 ± 18 years, p = 0.42), body mass index (31.1 ± 4.8 vs. 26.1 ± 7.1 kg/m2 , p = 0.19), or tumor size (6.8 ± 5.0 vs. 6.4 ± 4.7 cm, p = 0.82). At final follow-up, 67% (n = 35) of patients were alive and disease-free. Conclusions: Wound complications are not uncommon after resection of distal lower extremity STS. Our experience has been successful in achieving limb salvage in these challenging cases. Without PRS soft tissue management, however, many patients may alternatively be candidates for amputation.

Purpose: The use of intraoperative technology is increasing among orthopedic surgeons in the United States. However, there is continued debate as to whether intraoperative technologies provide clinical benefits in patients undergoing total knee arthroplasty (TKA). This study sought to determine whether the use of a novel intraoperative navigation technology produces equivalent or superior short-term outcomes compared to conventional technique. Methods: Fifty-nine consecutive patients underwent primary TKA with a novel imageless intraoperative navigational technology between October 2019 and January 2020 at a single, urban, orthopedic specialty hospital. A 1:1 cohort propensity matching was performed with patients with similar demographics who underwent primary TKA without the use of technology. Demographics, clinical data, as well as preoperative and 3-month Knee Injury and Osteoarthritis Outcome Score, Joint Replacement (KOOS, JR) scores were collected. Demographic differences, clinical data, and mean KOOS, JR scores were assessed using chi-squared analysis for categorical variables and independent sample t-test for continuous variables. Results: Upon 1:1 cohort matching, patients in both the navigational cohorts and non-navigational cohorts were statistically similar demographically. Length of stay (2.11 vs. 1.71 days; p = 0.108), surgical time (108.89 vs. 101.19 minutes, p = 0.066), discharge disposition (p = 0.675), 90- day readmissions (4 vs. 4, p = 0.999), and 90-day reoperations (2 vs. 2, p = 0.999) did not statistically differ between the two matched cohorts. Additionally, KOOS, JR scores evaluated between the two cohorts preoperatively (46.06 vs. 45.17, p = 0.836) and at 3-month follow-up (57.63 vs. 55.06, p = 0.580) were similar. Conclusion: This study demonstrates that the use of this novel intraoperative navigational technology yields similar short-term TKA results when compared to conventionally performed TKA. Further studies are required to validate new technologies and determine their effect on long-term clinical and patient-reported outcomes.

Purpose: The purpose of this study was to systematically review the evidence in the literature in order to evaluate the outcomes following medial patellofemoral ligament (MPFL) reconstruction with allograft compared to autograft reconstruction. Methods: A systematic literature search was performed based on PRISMA guidelines using the EMBASE, MEDLINE, and The Cochrane Library databases. Inclusion criteria for the study was clinical studies reporting on MPFL reconstruction with allograft. Recurrence rate, complications, rate of return-to-play, and functional outcomes including the Kujala, Tegner, and visual analog scale (VAS) scores were evaluated. Statistical analysis was performed using GraphPad Prism 8.3. Results: Our review identified 12 studies with a total of 336 patient knees meeting the inclusion criteria. The majority of patients were female (61.6%), with a mean age of 22.3 years and a mean follow-up of 43.4 months. The overall rate of recurrence of lateral patellar instability was 2.7% in the allograft cohort as compared to 7.8% in the autograft cohort (p = 0.01). The mean Kujala score was 91.8%, and the mean VAS score was 1.3 at final follow-up. Additionally, 81.5% of patients were able to return to play in the studies reporting this outcome measure. The overall complication rate was 1.4%. Conclusion: The overall rate of recurrence was lower following MPFL reconstruction with allograft as compared to autograft in the treatment of lateral patellar instability. Additionally, there were excellent patient reported outcomes and a low complication rate following the use of allograft for MPFL reconstructionPurpose: The purpose of this study was to systematically review the evidence in the literature in order to evaluate the outcomes following medial patellofemoral ligament (MPFL) reconstruction with allograft compared to autograft reconstruction. Methods: A systematic literature search was performed based on PRISMA guidelines using the EMBASE, MEDLINE, and The Cochrane Library databases. Inclusion criteria for the study was clinical studies reporting on MPFL reconstruction with allograft. Recurrence rate, complications, rate of return-to-play, and functional outcomes including the Kujala, Tegner, and visual analog scale (VAS) scores were evaluated. Statistical analysis was performed using GraphPad Prism 8.3. Results: Our review identified 12 studies with a total of 336 patient knees meeting the inclusion criteria. The majority of patients were female (61.6%), with a mean age of 22.3 years and a mean follow-up of 43.4 months. The overall rate of recurrence of lateral patellar instability was 2.7% in the allograft cohort as compared to 7.8% in the autograft cohort (p = 0.01). The mean Kujala score was 91.8%, and the mean VAS score was 1.3 at final follow-up. Additionally, 81.5% of patients were able to return to play in the studies reporting this outcome measure. The overall complication rate was 1.4%. Conclusion: The overall rate of recurrence was lower following MPFL reconstruction with allograft as compared to autograft in the treatment of lateral patellar instability. Additionally, there were excellent patient reported outcomes and a low complication rate following the use of allograft for MPFL reconstruction

A 50-year-old woman developed severe soft tissue atrophy of the hip following a triamincolone acetonide injection to the greater trochanteric bursa. Saline injection therapy was initially attempted without improvement and the defect was ultimately treated effectively with serial fat grafting. Adverse soft tissue reactions are rare but potentially devastating complications of corticosteroid injections, and the use of soluble steroid preparations and proper injection techniques can minimize the risk to surrounding tissue. Serial fat grafting represents a promising treatment option for severe cases of steroid-induced soft tissue atrophy.