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Stans, Anthony A.

https://orcid.org/0000-0002-1072-3072

Mayo Clinic

Mayo Clinic

Citations 26

Anterior Fibular Graft and Posterior Fusion for Proximal Cervical Kyphosis Following Resection of Posterior Fossa Ependymoma
Nugraha, Hans K, Graden, Nathan , Fogelson, Jeremy L., Stans, Anthony A. , Nugraha, Hans Kristian , Nugraha, Hans K , Graden, Nathan R , Fogelson, Jeremy L , Graden, Nathan R. , Fogelson, Jeremy L.

JBJS Case Connector | March 5, 2026 | Volume: 16 | Issue: 1 | Pages: No page available

10.2106/jbjs.cc.26.00022 Get It

Case: A 4-year-old boy with a history of posterior fossa ependymoma resection and radiation treatment developed postlaminectomy kyphosis at the occipito-cervical junction. Cervical radiographs showed 46° kyphosis between C2 and C4. A 3-stage surgical approach was done: halo-gravity traction, anterior C2 to C4 fusion with a fibular allograft, and posterior occiput-C4 instrumented fusion. Halo traction reduced kyphosis by over 50%. At 1-year follow-up, the patient showed stable fixation and successful fusion with modest limitation in cervical motion. Conclusion: The approach effectively corrected the deformity and successfully achieved fusion despite previous radiation treatment and bone deficiency in a very young, skeletally immature patient.
Rates of School Absences in Pediatric Scoliosis Patients and Work Absences in Their Parents/Caregivers: A Retrospective Analysis
Paradkar, Ria, Regan, Christina , Nolte, Charles P. , Stans, Anthony A. , Shaughnessy, William J. , Milbrandt, Todd A. , Larson, A. Noelle , Stans, Anthony, Shaughnessy, William, Mulford, Kellen, Larson, A Noelle , Paradkar, Ria , Mulford, Kellen L.

Journal of Clinical Medicine | December 23, 2024 | Volume: 13 | Issue: 24 | Pages: 7859

10.3390/jcm13247859 Get It

Background/Objectives: The burden of scoliosis care extends beyond treatment costs and includes missed school for patients and lost income for parents. Chronic absenteeism, defined as more than 18 days of missed school, can have a significant impact on a child’s educational progression, but missed school and work due to scoliosis treatment are not well quantified in the literature. This study investigates absenteeism among scoliosis patients and their caregivers. Methods: We conducted a retrospective comparative study of survey results based on surgery timing and surgery type. Patients and caregivers presenting for clinic visits for scoliosis treatment at a single large tertiary care center from 2014 to 2022 were queried. Results: We collected 2772 surveys from 1104 unique patients. Of these, 223 surveys from 132 patients were within one year of surgery: 140 post-fusion surveys, 71 post-nonfusion surveys, and 11 post-halo/multistage surgery surveys. A total of 2280 surveys were from 1022 nonoperatively treated patients. School absenteeism was significantly higher for surgeries during the school year compared to summer in both the fusion and nonfusion groups, though work absenteeism showed no significant differences. Halo/multistage surgery patients had the highest rates of absenteeism. Conclusions: This study highlights the impacts of scoliosis surgery timing and type on absenteeism among patients and their caregivers. Surgery during summer breaks reduces school absenteeism and academic disruption. Halo/multistage surgery patients face the greatest risk of chronic absenteeism from school, indicating a need for targeted interventions. Optimized surgical timing and planning can help families navigate the educational and financial challenges of scoliosis treatment.
Incidence and Long-term Follow-up of Pediatric Lateral Condyle Fractures: A Population-based Study
Wellings, Elizabeth P. , Sullivan, Mikaela H. , Thapa, Prabin , Grigoriou, Emmanouil , Stans, Anthony A. , Shaughnessy, William J. , Milbrandt, Todd A. , Larson, A. Noelle

Journal of Pediatric Orthopaedics | November 22, 2024 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.1097/bpo.0000000000002825 Get It

Objective: Lateral condyle fractures are the second most common pediatric elbow fracture after supracondylar humeral fractures. Early complications are frequent which can lead to development of long-term problems. Current literature has evaluated short-term outcomes, but few studies have investigated long-term outcomes into adulthood. Our hypothesis is that the majority of pediatric patients with a lateral condyle fracture will have minimal complications and few surgeries as they age. Methods: A population-based database was used to identify patients who sustained a lateral condyle fracture before the age of 18 between 1966 and 2012. Electronic medical records from all treatment centers in the county were reviewed for clinical and radiographic data. Analysis was performed to determine incidence and long term outcomes based on fracture type and treatment. Results: From 1966 to 2012, 227 pediatric lateral condyle fractures were identified. One hundred seventy-seven fractures (78%) had at least 10 year clinical follow up. Incidence was found to be 13.97 per 100,000. We identified 80 (45%) Weiss type 1, 61 (34%) type 2, and 37 (21%) type 3 fractures. The overall complication rate was 17%, of which 47% were identified >10 years from injury. There was no significant difference in complication rates based on fracture type (P = 0.18) or treatment type (P = 0.55). The most common complication was malunion (n = 15), followed by fishtail deformity (n = 4), stiffness (n = 3), lateral epicondylitis (n = 3), nonunion (n = 2), osteoarthritis (n = 2), and tardy ulnar nerve palsy (n = 1). Five patients underwent revision surgery for nonunion, cubitus valgus, malunion with loose bodies, capitellar osteochondral dessicans with malalignment, and ulnar nerve palsy. Conclusions: This population-based study estimated the overall incidence of pediatric lateral condyle fractures to be 14 per 100,000. Displaced fractures had a higher incidence than undisplaced fractures. Complications beyond 10 years are rare, but the need for future revision surgery is possible, therefore, proper patient and family education is necessary at the time of injury. This is the largest study with the longest follow-up for pediatric lateral condyle fractures. Complications were rare but resulted in a 17% complication rate and a 3% reoperation rate at a minimum. Level of Evidence: Level III.
Combined Lateral Closing and Medial Opening-Wedge Proximal Humerus Osteotomy in an Adolescent with Extreme Varus Deformity
Oeding, Jacob F. , Jacobson, Nathan J , Wentworth, Adam, Sems, S.A. , Stans, Anthony A. , Barlow, Jonathan D. , Wentworth, Adam J , Sems, Stephen A , Barlow, Jonathan D , Oeding, Jacob F

JBJS Case Connector | December 8, 2023 | Volume: 13 | Issue: 4 | Pages: No page available

10.2106/jbjs.cc.23.00426 Get It

Case: This report describes the case of an athletic 12-year-old boy who presented with a 64° left proximal humeral varus angulation deformity and physeal bar secondary to multiple operations for a proximal humeral metaphyseal cystic lesion and pathologic fracture. Using a combined lateral closing and medial opening-wedge osteotomy, a 68° valgus correction was achieved with excellent clinical and functional outcomes at 16-month follow-up. Forward flexion increased from 120 to 170° preoperatively to postoperatively while abduction improved from 110° preoperatively to 170° postoperatively. Conclusion: A combined lateral closing and medial opening-wedge osteotomy of the proximal humerus can successfully treat cases of extreme proximal humerus varus in the growing shoulder where unilateral or dome osteotomies are not suitable.
Long-Term Outcomes at Skeletal Maturity of Combined Pelvic and Femoral Osteotomy for the Treatment of Legg–Calve–Perthes Disease
Regan, Christina , Su, Alvin W.Y. , Stans, Anthony A. , Milbrandt, Todd A. , Shaughnessy, William J. , Grigoriou, Emmanouil , Regan, Christina M, Larson, A. Noelle

Journal of Clinical Medicine | September 1, 2023 | Volume: 12 | Issue: 17 | Pages: 5718

10.3390/jcm12175718 Get It

Surgical treatment for Legg–Calve–Perthes disease (LCPD) is recommended for older children with moderate to severe disease. We sought to determine whether double osteotomies lead to improved radiologic outcomes compared to reported non-operative outcomes. Patients older than 6 years of age diagnosed with LCPD lateral pillar B or C who were treated with pelvic and femoral osteotomies were included. Radiologic outcomes and leg-length discrepancies were assessed using the Stulberg classification and were compared with the current literature. Fifteen hips in fourteen patients were treated with double osteotomy for LCPD, and seven had lateral pillar C disease (47%). The mean age at surgery was 8.6 years (range, 7.2–10.4) and the mean age at follow-up was 20.2 years (range, 14.2–35.6). At a mean 11.6-year follow-up (range: 6.3–25.2), double osteotomy resulted in 40% of patients having Stulberg I/II scores, 27% having Stulberg III scores, and 33% having Stulberg IV/V scores. The mean leg-length discrepancy was 1.4 cm in lateral pillar C patients compared to 0.8 cm in lateral pillar B patients. Four patients underwent additional surgeries, including two who required total hip arthroplasty. Double osteotomy as an alternative surgical procedure for the treatment of LCPD did not show improved outcomes when compared to historic non-operative cohorts.
Normative Femoral and Tibial Lengths in a Modern Population of Twenty-First-Century U.S. Children
Chen, Chun‐Ho , Milbrandt, Todd A. , Babadi, Elham , Duong, Stephanie Q. , Larson, Dirk R. , Shaughnessy, William J. , Stans, Anthony A. , Hull, Nathan C. , Peterson, Hamlet A. , Larson, A. Noelle , Chen, Chunho , Larson, A Noelle , Larson, Dirk

Journal of Bone and Joint Surgery | February 2, 2023 | Volume: 105 | Issue: 6 | Pages: 468-478

10.2106/jbjs.22.00690 Get It

Background: The Green-Anderson (GA) leg-length data remain the gold standard for the age-based assessment of leg lengths in children despite their methodologic weaknesses. We aimed to summarize current growth trends among a cross-sectional cohort of modern U.S. children using quantile regression methods and to compare the median femoral and tibial lengths of the modern U.S. children with those of the GA cohort. Methods: A retrospective review of scanograms and upright slot-scanning radiographs obtained in otherwise healthy children between 2008 and 2020 was completed. A search of a radiology registry revealed 3,508 unique patients between the ages of 2 and 18 years for whom a standard-of-care scanogram or slot-scanning radiograph had been made. All patients with systemic illness, genetic conditions, or generalized diseases that may affect height were excluded. Measurements from a single leg at a single time point per subject were included, and the latest available time point was used for children who had multiple scanograms made. Quantile regression analysis was used to fit the lengths of the tibia and femur and overall leg length separately for male patients and female patients. Results: Seven hundred patients (328 female and 372 male) met the inclusion criteria. On average, the reported 50th percentile tibial lengths from the GA study at each time point were shorter than the lengths in this study by 2.2 cm (range, 1.4 to 3.3 cm) for boys and 2 cm (range, 1.1 to 3.1 cm) for girls. The reported 50th percentile femoral lengths from the GA study at each time point were shorter than the lengths in this study by 1.8 cm (range, 1.1 to 2.5 cm) for boys and 1.7 cm (range, 0.8 to 2.3 cm) shorter for girls. Conclusions: This study developed new growth charts for femoral and tibial lengths in a modern U.S. population of children. The new femoral and tibial lengths at nearly all time points are 1 to 3 cm longer than traditional GA data. The use of GA data for epiphysiodesis could result in underestimation of expected childhood growth. Level of Evidence: Prognostic Level IV . See Instructions for Authors for a complete description of levels of evidence.
Predictors of Total Hip Arthroplasty Following Pediatric Surgical Treatment of Developmental Hip Dysplasia at 20-Year Follow-Up
Young, Ernest, Regan, Christina , Milbrandt, Todd A. , Grigoriou, Emmanouil , Shaughnessy, William J. , Stans, Anthony A. , Larson, A. Noelle

Journal of Clinical Medicine | December 5, 2022 | Volume: 11 | Issue: 23 | Pages: 7198

10.3390/jcm11237198 Get It

Long-term outcomes of surgical treatment for pediatric developmental dysplasia of the hip (DDH) are not well defined. The purpose of this study was to report long-term radiographic and clinical outcomes, survivorship free of total hip arthroplasty (THA), and predictors of subsequent THA following childhood treatment of DDH. This study was a single-institution retrospective review of hips treated for DDH with closed or open reduction at a minimum 10-year follow-up. 107 patients (119 hips) were included with a mean patient age of 3.3 years at childhood treatment. At mean 30.5 years follow-up, 24 hips had undergone THA (20%). Mean patient age at time of THA was 33.5 years. None of the hips treated with closed reduction alone required THA, whereas 8 hips treated with open reduction (25%) underwent THA. Hips with patient age > 4 years at the time of treatment had lower survivorship at 35 years follow-up (50% vs. 85%; p < 0.001). Additionally, femoral osteotomy (OR 2.0, p < 0.001), and previous treatment elsewhere (27% vs. 16%; p < 0.01) were associated with subsequent THA. Early referral and appropriate intervention may prove important, as age and prior treatment were predictive of subsequent THA.
Bedside hip aspiration results in decrease in total general anesthesia time in pediatric patients: A multicenter study
Braig, Zachary V. , Pradhan, Pratik , Tibbo, Meagan E. , Padua, Horacio M. , Shaughnessy, William J. , Stans, Anthony A. , Milbrandt, Todd A. , Padua, Horacio , Larson, A. Noelle , Shore, Benjamin J.

Journal of Children's Orthopaedics | November 2, 2022 | Volume: 16 | Issue: 6 | Pages: 512-518

10.1177/18632521221135191 Get It

Purpose: The purpose of this study is to compare pediatric hip aspiration in the operating room under general anesthesia or via bedside aspiration under moderate sedation and delineate the anesthetic time required. Methods: A database query conducted at two academic institutions identified all patients under the age of 17 who underwent hip aspiration between 2000 and 2017. At one institution, aspiration was performed in the operating room under general anesthesia. Patients were kept anesthetized until cell count was complete. At the second institution, aspiration was performed in the emergency room at bedside under sedation. The medical record was reviewed for demographic data, hip aspiration results, diagnoses, treatment, and anesthesia time. Results: A total of 233 patients (233 hips) with a mean age of 7.2 years were identified. Seventy-five patients underwent aspiration in the operating room, and 158 patients underwent bedside aspiration. Patients with a negative aspiration averaged 87 min under anesthesia when performed in the operating room and 29 min under sedation when performed at bedside. Patients with a negative aspiration performed in the operating room after 5 pm averaged 99 min under anesthesia, and 73 min under anesthesia when performed between 7 am and 5 pm (p < 0.01). Seventy-eight (49%) patients who underwent bedside aspiration did not require operative intervention and therefore avoided general anesthesia. Conclusion: Pediatric hip aspiration performed in the operating room results in prolonged anesthesia times while synovial fluid is transported and processed. Anesthesia times are significantly longer after 5 pm. Bedside aspiration resulted in significantly less anesthesia exposure, with half of patients undergoing bedside aspiration avoiding general anesthesia altogether. Level of evidence: Level III.
Flap Reconstruction for Treatment of Pediatric Linear Scleroderma
Yan, María , Stans, Anthony A. , Moran, Steven L.

Annals of Plastic Surgery | May 24, 2021 | Volume: 87 | Issue: 5 | Pages: 533-536

10.1097/sap.0000000000002887 Get It

Background Linear scleroderma is a rare connective tissue disease characterized by thickening of the skin due to excess collagen deposit. It is the most frequent type of localized scleroderma in the pediatric population (40%–70%), and it usually affects the extremities and head. Linear scleroderma can cause growth disturbances, extremity length discrepancy, and debilitating joint contractures. The aim of this study was to describe the surgical outcomes of microsurgical flap reconstruction of linear scleroderma in the pediatric population. Methods A retrospective review of all children with linear scleroderma was performed at our institution. Patients less than 18 years of age with clinical diagnosis of linear scleroderma and who underwent microsurgical flap reconstruction for correction of their scleroderma were included. Fat grafting procedures were excluded. Patient demographics and surgical outcomes were collected. Results A total 7 patients underwent microsurgical flap reconstruction for treatment of their linear scleroderma producing debilitating soft tissue contractures and preventing ambulation or elbow extension. Six patients had scleroderma involving the lower extremity and 1 involving the upper extremity. Three anterolateral thigh and 4 latissimus dorsi flaps were performed. The median age at surgery was 7 years (Q1–Q3, 5–11), and the median body mass index was 21.3 kg/m2 (Q1–Q3, 16.5–22.1). The median follow-up was 121.1 months (Q1–Q3, 43.2–187.4). All flaps survived, and no donor site complications were reported. Perioperative complications included wound infection that required debridement (n = 1), immediate postoperative bleeding requiring surgical intervention (n = 1), intraoperative venous congestion (n = 1), and scleroderma recurrence outside the flap (n = 2). When comparing anterolateral thigh and latissimus dorsi flaps, there was no statistically significant difference in the development of surgical complications, number of surgical revisions per patient [median, 4 (Q1–Q3, 4–7) vs 2.5 (Q1–Q3, 1.3, 3), P = 0.0916], or unplanned surgical interventions [median, 0 (Q1–Q3, 0–1) vs 1 (Q1–Q3, 0–1), P = 0.7228]. The reconstruction was successful in improving range of motion in 6 patients, 5 of which reached full weight-bearing. However, all patients had residual limb deformity, and 4 had remaining extremity length discrepancy. Conclusions Microsurgical flaps are a good option for functional improvement of severe pediatric linear scleroderma affecting the extremities. However, residual limb deformity is common, and patients are often required to undergo additional surgical revisions.
Response to comment on O'Shaughnessy et al: ‘Management of paediatric humeral shaft fractures and associated nerve palsy’
O’Shaughnessy, Maureen , Parry, Joshua A. , Stans, Anthony A. , Milbrandt, Todd A. , Milbrandt, Todd A , Liu, Huan Huan, Larson, A. Noelle

Journal of Children's Orthopaedics | April 26, 2021 | Volume: 15 | Issue: 3 | Pages: 306-308

10.1302/1863-2548.15.200243 Get It