Publications by authors named "Jason Greenfield"

Article Synopsis
  • Three-dimensional (3D) bioprinting has evolved as a groundbreaking technology in surgery, facilitating advancements in reconstructive and regenerative medicine over the past five years.
  • Recent literature showcases innovations in creating complex, patient-specific tissues and organs that closely resemble natural tissue, enhancing surgical interventions.
  • Despite significant progress, challenges remain such as vascularization, integration with existing tissues, and long-term viability, highlighting the need for continued research and regulatory support to maximize its clinical potential.
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This study aims to compare the levels of intrinsic protein disorder within the human lens and zonule proteomes and investigate the role of aging as a potential influencing factor on disorder levels. A cross-sectional proteomic analysis was employed, utilizing a dataset of 1466 proteins derived from the lens and zonule proteomes previously published by Wang et al. and De Maria et al.

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Article Synopsis
  • High-resolution optical coherence tomography (HR-OCT) helps doctors see detailed pictures of eye surface problems, making it easier to diagnose and treat them.
  • It can show different types of issues like tumors and helps tell them apart, even when they look similar.
  • HR-OCT is important for doctors because it allows them to check how well treatments are working and keep an eye on any tumors that might grow back.
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Purpose: To develop an artificial intelligence (AI) model to diagnose Acanthamoeba keratitis (AK) based on in vivo confocal microscopy (IVCM) images extracted from the Heidelberg Retinal Tomograph 3 (HRT 3).

Methods: This retrospective cohort study utilized HRT 3 IVCM images from patients who had received a culture-confirmed diagnosis of AK between 2013 and 2021 at Massachusetts Eye and Ear. Two cornea specialists independently labeled the images as AK or nonspecific finding (NSF) in a blind manner.

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The purpose of this study was to examine how demographics, etiology, and clinical examination findings are related to visual outcomes in subjects with open globe injury (OGI) across a large and generalizable sample. A retrospective cohort analysis was performed using data collected from the electronic medical records of four tertiary university centers for subjects with OGI presenting from 2018 to 2021. Demographic information, injury mechanisms, clinical exam findings, visual acuity (VA) at presentation and most recent follow-up were recorded.

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Purpose: The aim of this review was to elucidate treatment preferences for ocular surface squamous neoplasia and to examine the changes in treatment modalities over the past 2 decades.

Methods: An electronic survey was distributed to members of The Cornea Society, Ocular Microbiology and Immunology Group, and 4 international corneal specialist listservs. Questions examined medical and surgical treatment preferences, and results were compared with surveys administered in 2003 and 2012.

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Unlabelled: Insurance coverage of postmastectomy breast reconstruction is mandated in America, regardless of reconstructive modality. Despite enhanced patient-reported outcomes, autologous reconstruction is utilized less than nonautologous reconstruction nationally. Lower reimbursement from Medicare and Medicaid may disincentivize autologous-based reconstruction.

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Purpose: Vivid Vision Perimetry (VVP; Vivid Vision, Inc) is a novel method for performing in-office and home-based visual field assessment using a virtual reality platform and oculokinetic perimetry. Here we examine the reproducibility of VVP Swift and compare results with conventional standard automated perimetry (SAP) and spectral-domain (SD) OCT.

Design: Cross-sectional study.

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Unlabelled: The aim of facial transplantation (FT) was to enhance quality of life (QoL) for individuals living with severe facial disfigurement. Yet QoL has proved challenging to assess, as the field lacks a unified approach for incorporating FT recipients' perspectives into meaningful QoL measures. In this study, we review FT recipients' self-reported QoL through a qualitative analysis of publicly available posttransplant interviews to identify the aspects of QoL they report as meaningful.

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Background: Prolonged impairment of protective ocular functions can compromise vision and lead to blindness if uncorrected. Several facial transplants have incorporated periorbital structures with variable eyelid preservation, but objective assessment of post-transplant periorbital function has been limited.

Materials And Methods: Kinematic data were collected from a full-face recipient that included the fist total eyelid transplantation at 5 separate pre-transplant (PRE) and post-transplant time points (T1-T4).

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Purpose: We describe a patient with primary angle-closure glaucoma who developed malignant glaucoma following laser peripheral iridotomy.

Methods: A 58-year-old male presented with peripheral and central anterior chamber shallowing following an uncomplicated Nd: YAG laser peripheral iridotomy. Intraocular pressure (IOP) and B-scan echography were normal, and there was -1.

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Purpose: Periorbital injuries are common in face transplantation (FT) candidates. It is therefore essential that the ophthalmologist play a central role in the multidisciplinary treatment of these patients. In this study, the authors perform a comprehensive review of all procedures involving periorbital components, provide an update for the ophthalmology community regarding the current state of the field, and present 2 cases.

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Article Synopsis
  • Orthognathic surgery is important for improving facial aesthetics, correcting dental issues, and treating obstructive sleep apnea, but complication rates between bimaxillary and single-jaw surgeries are not well understood.
  • An analysis using the American College of Surgeons database compared outcomes among patients undergoing different jaw surgeries, revealing that bimaxillary surgery had higher complication rates, longer operative times, and longer hospital stays compared to single-jaw surgeries.
  • Key risk factors for complications included performing bimaxillary surgery in an outpatient setting and having a higher American Society of Anesthesiology (ASA) class (3 or higher), indicating more severe medical conditions.
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Article Synopsis
  • The increasing number of older patients seeking panniculectomy due to obesity has raised concerns regarding the safety of this surgery for individuals aged 65 and older, as previous evaluations have not specifically addressed this age group's risks.* -
  • A study using the ACS-NSQIP database revealed that out of 7030 patients who had panniculectomy, a small subset (8.2%) were aged 65 or older, and they faced higher risks for wound and overall complications compared to younger patients.* -
  • The findings stress the need for thorough preoperative assessments and management of modifiable risk factors to improve safety and outcomes for older patients undergoing abdominal panniculectomy.*
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Introduction: Penile prosthesis infections remain challenging despite advancements in surgical technique, device improvements, and adoption of antibiotic prophylaxis guidelines.

Aim: To investigate penile prosthesis infection microbiology to consider which changes in practice could decrease infection rates, to evaluate current antibiotic prophylaxis guidelines, and to develop a proposed algorithm for penile prosthesis infections.

Methods: This retrospective institutional review board-exempt multi-institutional study from 25 centers reviewed intraoperative cultures obtained at explantation or Mulcahy salvage of infected three-piece inflatable penile prostheses (IPPs).

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Purpose: Since its introduction in 1996 Mulcahy salvage has significantly improved outcomes for the removal and replacement of infected inflatable penile prostheses. Long-term followup data of Mulcahy salvage show an infection-free rate of 82%. A multicenter retrospective analysis of the malleable implant salvage technique was conducted to assess infection outcomes and the feasibility of conversion from malleable device back to inflatable penile prosthesis.

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Introduction: Inflatable penile prosthesis (IPP) implantation is a well-established treatment for medically refractory erectile dysfunction, with long-term reliability. Overall survival is 96% at 5 years and 60% at 15 years for primary (virgin) implantation.

Aim: The aim of this study was to explore factors associated with success and complications of IPP revision surgery in a multicenter study.

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Introduction: A clear set of guidelines has not been defined in the use of antibiotics in penile prosthesis implantation. Aim.  We surveyed urologists throughout the United States to determine current practice patterns regarding antibiotic use in primary and revision penile prosthesis surgery.

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Introduction: The debate about leaving a closed-suction drain during penile implant surgery remains unsolved. What is the current thinking about the pros and cons of leaving a scrotal drain for inflatable penile implant (IPP) surgery?

Aims: The aim of this study is to explore the fund of existing information, and formulate a point and counterpoint debate analyzing the drain issue for implant surgery.

Methods: Two differing points of view are given to answer the question of benefit vs.

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Background: The condition of "buried" penis may arise from several factors. Although the pediatric form is a rare congenital disorder, it may become an acquired condition in adulthood, most commonly from obesity, radical circumcision, or penoscrotal lymphedema. As obesity has become a national epidemic, the incidence of this phenomenon will inevitably increase.

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Penile traction therapy has traditionally been implemented to increase penile length but has recently been investigated for reducing the curvature associated with Peyronie's disease. The results of a few initial investigations have been conflicting, and further research is needed to confirm the true benefit of such therapy and its potential role in treating Peyronie's disease as both a monotherapy and in combination with other therapeutic options.

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Introduction: Hypercholesterolemia causes a decrease in normal corporal tissue vasoreactivity in a preclinical model of erectile dysfunction. Previous studies have shown that intracorporal injection (ICI) of basic fibroblast growth factor (bFGF) reverses some of the detrimental vasoreactivity effects of hypercholesterolemia and increases vascular endothelial growth factor (VEGF) expression.

Aim: We sought to determine whether the beneficial effects of bFGF are VEGF-mediated.

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