Publications by authors named "Austin Yu"

Objectives: To investigate post-operative opioid use, functionality, and overall survival following internal fixation for pathologic or impending fractures at 3 and 6 months.

Background: Pathologic and impending fractures commonly occur in the proximal femur, and patients may be prescribed opioids prior to surgery and often require opioids for post-operative pain relief. This study compared post-operative opiate usage and ambulatory functional status in patients with impending versus pathologic fractures in the proximal femur.

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Desmoid tumor (DT), also known as desmoid fibromatosis, is a rare, locally proliferative tumor characterized by an overgrowth of myofibroblastic cells. Due to the varied clinical presentation of DT, there are a multitude of treatment options. This study provides our institutional experience in characterizing and treating DT as well as patient outcomes.

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Background: Chondrosarcoma accounts for 20% of all bone sarcomas and may present with soft tissue extension. The presence of an extraosseous component, along with positive surgical margins, independently have been associated with increased risk of local recurrence and decreased survival. The purpose of this investigation is to describe the treatment and outcomes of six chondrosarcoma patients who presented with chondrosarcoma with soft tissue extension along with positive surgical margins post negative en bloc resection.

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Background: Chondrosarcoma accounts for 20% of all bony sarcomas and may present with extraosseous extension (EOE). The presence of an extraosseous component, along with positive surgical margins, has been separately associated with increased risk of local recurrence and decreased survival. This study compared the outcomes between patients with EOE, EOE and positive margins, and a control chondrosarcoma cohort with neither feature.

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Introduction: Atypical lipomatous tumor (ALT) in the extremities is a locally aggressive adipocytic tumor with the potential risk of transformation into dedifferentiated liposarcoma (DDLS). Studies seldom differentiate whether DDLS was diagnosed on initial biopsy, final resected specimen, or subsequent recurrence. Our study seeks to characterize how and when patients received their ALT or DDLS diagnoses to better understand the relationship between the two neoplasms.

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Article Synopsis
  • Proximal femoral replacement (PFR) is a surgical technique used after tumor removal or failed hip replacements, but the risk of prosthetic instability is higher when there’s significant bone or soft tissue loss.
  • This study analyzed the outcomes of PFR among 106 patients over 15 years, categorizing them by the type of implant used: bipolar, constrained, or dual mobility.
  • Results showed that dual mobility implants had a longer time to dislocation and that smoking history and BMI differed among the groups, but all types had similar rates of early dislocation overall.
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  • The study analyzes the FDA's MAUDE database to identify and characterize adverse events linked to femtosecond (FS) laser-assisted LASIK surgeries from January 2012 to April 2022.
  • A total of 1,136 relevant adverse events were identified from 3,491 reports, with common intraoperative complications being incomplete cuts and difficulties with the flap, while diffuse lamellar keratitis (DLK) was the most frequent postoperative issue.
  • This research highlights the prevalence of specific complications during and after FS-assisted LASIK and aims to improve awareness and patient counseling for ophthalmologists.
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Purpose: To perform a meta-analysis and systematic review to compare the efficacy and complications of micropulse laser trabeculoplasty (MLT) and selective laser trabeculoplasty (SLT) in adult patients with open-angle glaucoma (OAG) and ocular hypertension (OHT).

Methods: We performed a systematic review utilizing PubMed, Embase, and Scopus, on April 8, 2024. Meta-analyses were performed for the mean change in intraocular pressure (IOP) at one-month, six-month, and one-year follow-up visits, rate of IOP spikes (>5 mmHg increase from the pre-procedure baseline IOP), rate of treatment failure (<20% or <3 mmHg reduction in IOP or requiring additional medications or procedures), and mean change in number of medications.

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  • Internal hemipelvectomy is a surgery used to remove tumors from the pelvic area without losing a limb, but it can be tricky due to the complex areas involved.
  • The study looked at patients who had this surgery and how well they did afterward, focusing on issues like complications and recovery.
  • Researchers also reviewed other studies to gather more information on patient outcomes after this type of surgery.
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Background: In clinical practice, internal fixation (IF) is a commonly utilized technique for metastatic bone disease (MBD) to the distal femur. Additionally, distal femoral reconstruction (DFR) has shown to be an effective surgical technique for primary tumors and MBD in the distal femur. The existing body of research comparing these methods has not focused on MBD or pathological fractures and thus does not guide surgical approach in the case of distal femoral MBD.

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Introduction: Spina bifida is a rare neurological condition that, if uncorrected, may cause chronic valgus knee stress difficulty with independent ambulation and significant pain. Current literature lacks comprehensive guidance on surgically correcting progressive hip and knee deformities in spina bifida patients, which include osteotomy and primary. When these options are contraindicated, alternative approaches such as arthrodesis may be indicated, although they remain understudied in this population.

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Myxoid/round cell liposarcomas (MRCLPS) are a rare soft tissue sarcoma. We report the largest sarcoma in our institutional history. We discuss the patient's surgical management and treatment of the tumor and challenges given its dimensions.

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Article Synopsis
  • Total humeral endoprosthetic reconstruction (THER) is a rare but essential option for limb salvage in patients with large humeral tumors or significant bone damage.
  • A literature review of 29 articles involving 175 patients showed that most cases were due to neoplasms, with a follow-up period averaging nearly 62 months and a Musculoskeletal Tumor Society score of about 74%.
  • Complications included revisions in 23% of cases, shoulder instability in 36%, and deep infections in 13.5%, highlighting the importance of understanding potential risks associated with THER.
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Purpose: Machine learning (ML) models have been used to predict cancer survival in several sarcoma subtypes. However, none have investigated extremity leiomyosarcoma (LMS). ML is a powerful tool that has the potential to better prognosticate extremity LMS.

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Purpose: Determine the pediatric prevalence of keratoconus (KC) using Scheimpflug corneal tomography.

Methods: A prospective observational study was done on subjects aged 3 to 18 years at the Princeton Vision Clinic, Chicago, IL. Scheimpflug tomography (Pentacam HR, OCULUS Optikgerate GmbH) scans (Belin/Ambrósio Enhanced Ectasia BAD3) yielded BAD Final D (Final D) and Back Elevation at the Thinnest Point (BETP) measurements.

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A patient presented with melanocytoma and associated choroidal neovascular membrane with hemorrhage involving the macula. The patient was treated with monthly aflibercept (Eylea) injections with significant improvement of best corrected visual acuity. In this report, we explore the development of a choroidal neovascular membrane (CNVM) formation in a patient with melanocytoma and the effect of intravitreal aflibercept (Eylea) on disease course.

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Case: A 10-year-old boy presented with bilateral absent patella and dislocation of the extensor mechanism in the left lower extremity. He underwent a lateral release and medial plication of the extensor mechanism with a Roux-Goldthwait procedure, followed by casting and bracing treatment. The patient fully recovered with a return to sports and improved active range of motion.

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Objectives: To report on baseline refractive and keratometric values and their correlation with tomographic characteristics of eyes with keratoconus (KC).

Methods: Retrospective chart review of patients treated in a single-center cornea and refractive surgery practice. Baseline topographic measurements were reviewed for 1,012 keratoconic eyes of 586 patients between 2008 and 2018.

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In this report, we discuss contact lens (CL) fitting in a patient with a history of keratoconus (KC), before and after undergoing topography-guided photorefractive keratectomy (TG PRK). Before TG PRK, the patient failed multiple CL modalities and reported difficulty with his habitual CLs and inadequate spectacle-corrected visual acuity to perform his activities of daily living. In this case, a collaborative, comprehensive approach to visual management in a patient with KC was used, and after TG PRK was performed to improve his corneal contour and symmetry, our patient was fit with a standard soft CL and additionally had improved spectacle-corrected visual acuity.

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Objectives: To report on the topographic and visual outcomes 10 years after corneal cross-linking in patients with progressive keratoconus and corneal ectasia after refractive surgery.

Methods: Cross-sectional cohort study of an original, prospective, randomized, clinical trial. Patients treated in a single center cornea and refractive surgery practice as part of the U.

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Purpose: To report results of Corneal Tissue Addition Keratoplasty (CTAK) for keratoconus (KC) and ectasia after laser in situ keratomileusis.

Setting: Cornea and refractive surgery practice.

Design: Single center, prospective, open label clinical trial.

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Introduction: Total joint arthroplasty (TJA) volume and the number of orthopaedic surgeons in the United States have increased in recent years, but local growth variation has not been studied. This study assesses recent changes in state-level distribution of orthopaedic surgeons in the United States and corresponding local trends in TJA volume.

Methods: Data from the National Inpatient Sample database (2000 to 2014) were reviewed.

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Purpose: Enhanced Recovery after Surgery (ERAS) pathways have been shown to decrease length of stay (LOS) after posterior spinal fusion (PSF) for adolescent idiopathic scoliosis (AIS). The aim of this study was to compare immediate post-operative outcomes following an ERAS pathway with a traditional pathway for AIS.

Methods: A prospective dual-center study of patients treated using an ERAS pathway (203 patients) or a traditional discharge (TD) pathway (73 patients) was performed with focus on pain at discharge, quality of life at one month, and return to school/work.

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Background: With the recent removal of total knee arthroplasty (TKA) from the Centers for Medicare and Medicaid Services (CMS) Inpatient Only list, facility reimbursement for outpatient TKA now falls under the Outpatient Prospective Payment System at the same rate as unicompartmental knee arthroplasty (UKA). The purpose of this study was to compare true facility costs of patients undergoing outpatient TKA with those undergoing UKA.

Methods: We reviewed a consecutive series of 2310 outpatient TKA and 231 UKA patients from 2018 to 2019.

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Background: The goal of kinematically aligned (KA) total knee arthroplasty (TKA) is to restore native knee anatomy. However, there are concerns about patellofemoral tracking problems with this technique that lead to early revision. We measured the differences between preoperative anatomic alignment and postoperative component alignment in a consecutive series of KA TKA and evaluated the association between alignment changes and the likelihood of early revision.

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