Publications by authors named "Aaron Knox"

Field sterility and Wide Awake Local Anesthesia No Tourniquet (WALANT) technique is a commonly used operative technique for many hand and wrist pathologies. We present a case of a successful proximal row carpectomy using WALANT and field sterility in a minor surgery operating theatre setting. These techniques can be applied in appropriate patients to reduce the overall cost of surgery, anesthetic complications, and prolonged hospital stay.

View Article and Find Full Text PDF

The purpose of this study is to gather the practices and perceptions among upper extremity surgeons regarding the use of musculoskeletal ultrasound for diagnostic and therapeutic intervention. A 36-question survey was developed from a literature review and author consensus. This survey was then piloted among a small group of hand surgeons prior to distribution.

View Article and Find Full Text PDF

Pediatric high-grade gliomas (PHGG) are aggressive, undifferentiated CNS tumors with poor outcomes, for which no standard-of-care drug therapy currently exists. Through a knockdown screen for epigenetic regulators, we identified PRMT5 as essential for PHGG cell growth. We hypothesized that, similar to its effect in normal cells, PRMT5 promotes self-renewal of stem-like PHGG tumor initiating cells (TICs) essential for tumor growth.

View Article and Find Full Text PDF
Article Synopsis
  • * A case involving a patient with onycholysis caused by porphyria cutanea tarda is discussed where a technique from 2003 was implemented to successfully lengthen the nail bed.
  • * The procedure involved removing a crescent-shaped piece of the nail bed from all five fingers on the right hand in one surgery, which was found to be effective and met the patient's expectations.
View Article and Find Full Text PDF
Article Synopsis
  • The study reviews the implementation of competency-based residency training in plastic surgery, highlighting limited pediatric exposure for Canadian graduates.
  • A retrospective analysis of case logs from 55 residents across 10 training programs revealed only 5.2% of logged cases were core pediatric procedures, with significant variations between programs.
  • The findings indicate that residents primarily assist in surgeries rather than perform them, suggesting a need for improved curriculum and simulation to enhance pediatric plastic surgery training.
View Article and Find Full Text PDF
Article Synopsis
  • Nail bed injuries are common in primary care and require timely and effective treatment to maintain finger function and appearance.
  • Primary care physicians should conduct a thorough physical and neurovascular examination to assess the severity of the injury and determine the appropriate treatment approach.
  • Treatment varies based on the type of injury, with some cases needing exploration and repair, while others, like subungual hematomas with an intact nail, may not require invasive procedures.
View Article and Find Full Text PDF

Background: Diffuse midline glioma (DMG) is an aggressive pediatric central nervous system tumor with strong metastatic potential. As localized treatment of the primary tumor improves, metastatic disease is becoming a more important factor in treatment. We hypothesized that we could model craniospinal irradiation (CSI) through a DMG patient-derived xenograft (PDX) model and that CSI would limit metastatic tumor.

View Article and Find Full Text PDF

The hospital can be saturated with noxious smells. Anecdotally, medical staff apply products to surgical masks to lessen the impact of these smells. This study aimed to determine the odour-masking ability of 4 inexpensive and convenient products.

View Article and Find Full Text PDF

Brain tumors are the most common solid tumor in children, and low-grade gliomas (LGGs) are the most common childhood brain tumor. Here, we report on 3 patients with LGG harboring previously unreported or rarely reported RAF fusions: FYCO1-RAF1, CTTNBP2-BRAF, and SLC44A1-BRAF. We hypothesized that these tumors would show molecular similarity to the canonical KIAA1549-BRAF fusion that is the most widely seen alteration in pilocytic astrocytoma (PA), the most common pediatric LGG variant, and that this similarity would include mitogen-activated protein kinase (MAPK) pathway activation.

View Article and Find Full Text PDF

North American residency programs are transitioning to competency-based medical education (CBME) to standardize training programs, and to ensure competency of residents upon graduation. At the centre of assessment in CBME are specific surgical procedures, or procedural competencies, that trainees must be able to perform. A study previously defined 31 procedural competencies for aesthetic surgery.

View Article and Find Full Text PDF

Introduction: Many articles have been published outlining the resident selection process for plastic surgery training programs. However, which qualities Canadian plastic surgeons value most in their current residents remains unclear. A national survey study was conducted to identify which attributes surgeons associate with the highest resident performance and which behaviours trainees should prioritize during their training.

View Article and Find Full Text PDF

Purpose: Core procedural competencies (CPCs) in hand surgery have been previously described. However, it is unknown whether plastic surgery residents receive sufficient operative experience with these procedures. This study aimed to determine whether Canadian plastic surgery residents are receiving adequate exposure to CPCs in hand surgery during residency training.

View Article and Find Full Text PDF

Background: Hundreds of systemic chemotherapy trials in diffuse intrinsic pontine glioma (DIPG) have not improved survival, potentially due to lack of intratumoral penetration, which has not previously been assessed in humans.

Methods: We used gemcitabine as a model agent to assess DIPG intratumoral pharmacokinetics (PK) using mass spectrometry.

Results: In a phase 0 clinical trial of i.

View Article and Find Full Text PDF

Title: Variable experience in microsurgery and flap-based procedures among Canadian plastic surgery residents.

Objective: Plastic surgery residencies are transitioning toward a competency-based education model. It is not known whether trainees can realistically achieve proficiency in microsurgical techniques during their training.

View Article and Find Full Text PDF

The original version of this Article omitted the following from the Acknowledgements: This work was supported by the Luke's Army Pediatric Cancer Research Fund St. Baldrick's Scholar Award. This has now been corrected in both the PDF and HTML versions of the Article.

View Article and Find Full Text PDF

High-grade gliomas (HGG) afflict both children and adults and respond poorly to current therapies. Epigenetic regulators have a role in gliomagenesis, but a broad, functional investigation of the impact and role of specific epigenetic targets has not been undertaken. Using a two-step, in vitro/in vivo epigenomic shRNA inhibition screen, we determine the chromatin remodeler BPTF to be a key regulator of adult HGG growth.

View Article and Find Full Text PDF
Article Synopsis
  • * A review of case logs from 55 residents over a 10-year period showed that burn-related procedures comprised 6.8% of all logged surgeries, with each resident averaging 73 burn procedures, predominantly involving autograft applications, while critical procedures like escharotomy were performed less frequently.
  • * The findings highlight that while Canadian plastic surgery residents receive adequate training for most burn care competencies, the infrequent practice of critical emergency procedures indicates a need for additional educational resources to ensure comprehensive competency before graduation.
View Article and Find Full Text PDF

Background: Tissue expansion in the lower extremity is controversial, with studies reporting complication rates as high as 83%. Few studies have looked at tissue expansion prior to orthopaedic correction of severe foot and ankle deformities, and those available are restricted to clubfoot in the pediatric population. Here, we report the largest case series on the use of tissue expanders for the reconstruction of severe foot and ankle deformity and the only report in adults.

View Article and Find Full Text PDF

Background: Plastic surgery residency training programs are working toward integrating competency-based education into program curriculum and training, a key component of which involves establishing core procedural competencies. This study aims to determine the exposure of graduating Canadian plastic surgery residents to established core procedural competencies.

Methods: A retrospective review of case log procedure data using three databases (T-Res, POWER, and New Innovations) from graduating residents at all 10 Canadian English-speaking plastic surgery training programs between 2004 and 2014 was completed.

View Article and Find Full Text PDF

Objective: To perform a needs assessment of journal club in plastic surgery residency programs. Specifically, this study focused on potential gaps in journal club associated with teaching and assessing critical appraisal of the literature, an important component of medical education and practice.

Methods: This is a qualitative study that utilized an online survey tool to collect information about the characteristics of journal club in plastic surgery residency programs in both Canada and the United States.

View Article and Find Full Text PDF

Background: Transitioning to competency-based surgical training will require consensus regarding the scope of plastic surgery and expectations of operative ability for graduating residents. Identifying surgical procedures experts deemed most important in preparing graduates for independent practice (i.e.

View Article and Find Full Text PDF

Background: Many plastic surgeons advocate smoking cessation before patients undergo cosmetic surgery with extensive soft-tissue dissection. Smoking cessation rates after cosmetic surgery are unknown. The preoperative consultation may be an opportunity to promote long-term smoking cessation.

View Article and Find Full Text PDF

Background: Many techniques exist for subcutaneous mastectomy in female-to-male transgender patients. The authors review outcomes for two techniques and present an algorithm to aid surgeons in technique selection.

Methods: One hundred one consecutive female-to-male transgender patients undergoing subcutaneous mastectomy using the concentric circular or free nipple graft technique were retrospectively reviewed.

View Article and Find Full Text PDF

Mastery learning is an instructional approach in which educational progress is based on demonstrated performance, not curricular time. Learners practice and retest repeatedly until they reach a designated mastery level; the final level of achievement is the same for all, although time to mastery may vary. Given the unique properties of mastery learning assessments, a thoughtful approach to establishing the performance levels and metrics that determine when a learner has demonstrated mastery is essential.

View Article and Find Full Text PDF