Publications by authors named "Nicholas R Mahoney"

Article Synopsis
  • Ocular adnexal sebaceous carcinoma (SebCA) is a type of eye tumor that is hard to understand and often needs intense surgery to treat.
  • Researchers aimed to create new cell lines from tumor samples to better study the tumor and test drugs.
  • Three cell lines were created, showing specific growth patterns and reactions to drug treatments, which will help scientists learn more about SebCA and find better treatment options.
View Article and Find Full Text PDF

Purpose: To compare the accuracy and readability of responses to oculoplastics patient questions provided by Google and ChatGPT. Additionally, to assess the ability of ChatGPT to create customized patient education materials.

Methods: We executed a Google search to identify the 3 most frequently asked patient questions (FAQs) related to 10 oculoplastics conditions.

View Article and Find Full Text PDF

Purpose: To describe tumor response and cranial nerve function outcomes after administration of anti-PD-1 to patients with cutaneous squamous cell carcinoma (CSCC) with perineural spread to cranial nerves (CN) extending into the cavernous sinus.

Methods: Electronic patient records from a single institution were queried for patients with CSCC of the head and neck causing diplopia (ICD-10 H53.2) who were treated with anti-PD-1.

View Article and Find Full Text PDF

Unlabelled: The dacryocystorhinostomy procedure creates a direct passageway between the lacrimal sac and nasal cavity, bypassing any nasolacrimal duct obstruction. Use of a continuous positive airway pressure device after dacryocystorhinostomy can cause nasolacrimal air regurgitation. Here, we report a case of air regurgitation after dacryocystorhinostomy that was successfully treated with placement of a Mini Monoka device, a silicone stent used in nasolacrimal surgery to prevent closure of the passageway, in a patient using a continuous positive airway pressure machine.

View Article and Find Full Text PDF

Mpox is an emerging zoonotic infection with potentially severe ocular and periocular consequences, particularly in immunocompromised patients. This report summarizes 2 cases of fulminant mpox presenting in patients with AIDS. In the first case, confluent lesions resulted in orbital compartment syndrome and total eyelid necrosis.

View Article and Find Full Text PDF

Acellular porcine urinary bladder matrix promotes wound healing and is also used to stimulate hair growth. A 64-year-old female presented with acute-onset OD pain and decreased visual acuity after subcutaneous injection of acellular porcine urinary bladder matrix at the hairline. Fundus examination revealed multiple emboli at retinal arcade branch points, and fluorescein angiography demonstrated corresponding areas of peripheral nonperfusion.

View Article and Find Full Text PDF

Background/aims: To assess surgical patterns in ophthalmology by subspecialty in the USA.

Methods: Ophthalmic surgeons were categorised as comprehensive/subspecialist based on billed procedures in the 2017-2018 Medicare Provider Utilization and Payment Data. Poisson regression models assessed factors associated with physicians performing surgeries in the core domain (eg, cataract extractions) and subspecialty domain.

View Article and Find Full Text PDF

Background And Objective: Teprotumumab is a fully human IgG1 monoclonal antibody against insulin-like growth factor-1 receptor (IGF-1R). It has been approved by the FDA to treat thyroid eye disease (TED) by reducing extraocular muscle and orbital fat volume. In clinical trials, hearing loss was noted as a side effect in 7 to 12% of patients, but no formal audiometric investigations of these patients were reported.

View Article and Find Full Text PDF

Purpose: Orbital fat hyperplasia commonly occurs in thyroid-associated orbitopathy (TAO). To understand molecular mechanisms underlying orbital adipogenesis, we used transcriptomics to compare gene expression in controls and patients with TAO, as well as in orbital fibroblasts (OFs) undergoing adipogenic differentiation.

Methods: We performed bulk RNA sequencing (RNA-Seq) on intraconal orbital fat from controls and patients with TAO.

View Article and Find Full Text PDF

Purpose: To present the application of computer-assisted surgery (CAS) in pre-operative planning, intra-operative navigation, and post-operative assessment as an adjunct tool in orbital surgery.

Methods: An IRB-approved, retrospective review was performed to identify patients who had undergone orbital surgery by a single surgeon from July 2013 to December 2019 with attention to pre-operative virtual surgical planning, intra-operative navigation, and post-operative assessment. The reasons and methods of CAS use were classified.

View Article and Find Full Text PDF

Retrobulbar fat deposits surround the posterior retina and optic nerve head, but their function and origin are obscure. We report that mouse retrobulbar fat is a neural crest-derived tissue histologically and transcriptionally resembles interscapular brown fat. In contrast, human retrobulbar fat closely resembles white adipose tissue.

View Article and Find Full Text PDF

Purpose: To investigate the frequency of primary versus secondary eye removal, frequency of enucleation versus evisceration, and characteristics and outcomes of patients undergoing these procedures after presenting with severe ocular trauma.

Patients And Methods: Retrospective chart review of patients presenting to the emergency department (ED) with severe eye trauma necessitating enucleation or evisceration between 2010 and 2018.

Results: There were 92 eyes from 90 patients included in our study.

View Article and Find Full Text PDF

Late-onset orbital hemorrhage is a rare complication of alloplastic implant use in orbital wall reconstruction following trauma. The authors report 3 patients with chocolate cysts presenting 3 to 9 years after orbital fracture repair with porous polyethylene implants. All patients were managed by implant removal and evacuation of cyst contents.

View Article and Find Full Text PDF

Purpose: The Kaneka Lacriflow CL (Lacriflow) bicanalicular lacrimal intubation system was evaluated as a self-retaining alternative to traditional modalities for stenting and dilation of the lacrimal drainage system in proximal lacrimal drainage system stenosis.

Patients And Methods: A retrospective chart review was conducted to assess the use of the Lacriflow system for treatment of patients with punctal and canalicular stenosis. Anesthesia type, operative time, and complications were assessed.

View Article and Find Full Text PDF

Background: Floppy eyelid syndrome is a disorder in which the tarsal plate is easily distensible and is currently treated with conservative or surgical measures. Human tarsal plate contains type I collagen, which is crosslinked in corneal tissue as a treatment for keratoconus. We hypothesized that collagen crosslinking would similarly stiffen tarsal plate tissue and investigated this in porcine and human tarsal plate specimens.

View Article and Find Full Text PDF

This article aimed to assess the effects of (1) mesh (e.g., uncoated anatomic titanium plates) versus non-mesh (e.

View Article and Find Full Text PDF

Purpose: In evaluating patients sustaining bilateral isolated internal orbital fractures, the authors have observed both similar fracture locations and also similar expansion of orbital volumes. In this study, we aim to investigate if there is a propensity for the 2 orbits to fracture in symmetrically similar patterns when sustaining similar trauma.

Methods: A retrospective chart review was performed studying all cases at our institution of bilateral isolated internal orbital fractures involving the medial wall and/or the floor at the time of presentation.

View Article and Find Full Text PDF

Purpose: Reconstruction of orbital wall fractures is demanding and has improved dramatically with the implementation of new technologies. True-to-original accuracy of reconstruction has been deemed essential for good clinical outcome, and reasons for unfavorable clinical outcome have been researched extensively. However, no detailed analysis on the influence of plate position and surface contour on clinical outcome has yet been published.

View Article and Find Full Text PDF

Background: Restoration of orbital volume after internal orbital fractures can prevent enophthalmos. A variety of allografts are commonly used including titanium mesh with and without porous polyethylene coating. Some controversy exists over the use of uncoated titanium mesh in the orbit.

View Article and Find Full Text PDF

Background: Medical educators, residents and administrators have increasing access to a large quantity of electronic resources. This content can augment and improve our teaching methods but can be difficult to consolidate and present. A multitude of electronic learning management systems are available to help organize and serve this content though never with small residency programs as the target userbase.

View Article and Find Full Text PDF

Purpose: A variety of implants are available for orbital reconstruction. Titanium orbital mesh plates are available either as standard preformed implants or able to be individualized for the patient. The aim of this study was to analyze whether individualized orbital implants allow a more precise reconstruction of the orbit than standard preformed implants.

View Article and Find Full Text PDF

Purpose: To evaluate the usage of preoperative digital anatomic implant evaluation in internal orbital fractures.

Methods: An IRB-approved review of cases of orbital fracture repair was conducted and cases where digital implant modeling was performed were selected for comprehensive review. The surgical time of these cases was also compared with surgeon and implant matched controls.

View Article and Find Full Text PDF

Background: Pediatric orbital fractures represent a challenging and sometimes controversial clinical problem. Patients may present with clear indications for surgery, but most require balancing benefits against intraoperative and late complications. The authors assessed these fractures at a state-designated ophthalmology referral center to develop criteria for surgery.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessiont2h9pgncs95r06l7lb1gr0gr38rp124u): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once