Position in proton Bragg curve influences DNA damage complexity and survival in head and neck cancer cells.

Background And Purpose: Understanding the cellular and molecular effect of proton radiation, particularly the increased DNA damage complexity at the distal end of the Bragg curve, is current topic of investigation. This work aims to study clonogenic survival and DNA damage foci kinetics of a head and neck squamous cell carcinoma cell line at various positions along a double passively scattered Bragg curve. Complementary studies are conducted to gain insights into the link between cell survival variations, experimentally yielded foci and the number and complexity of double strand breaks (DSBs).

Position-based assessment of head impact frequency, severity, type, and location in high school American football.

Introduction: Research on head impact characteristics, especially position-specific investigations in football, has predominantly focused on collegiate and professional levels, leaving a gap in understanding the risks faced by high school players. Therefore, this study aimed to investigate the effect of three factors-player position, impact location, and impact type-on the frequency, severity, and characteristics of impacts in high school American football. Additionally, we examined whether and how player position influences the distribution of impact locations and types.

Self-healable and pH-responsive spermidine/ferrous ion complexed hydrogel Co-loaded with CA inhibitor and glucose oxidase for combined cancer immunotherapy through triple ferroptosis mechanism.

Tumor microenvironment governs various therapeutic tolerability of cancer such as ferroptosis and immunotherapy through rewiring tumor metabolic reprogramming like Warburg metabolism. Highly expressed carbonic anhydrases (CA) in tumor that maintaining the delicate metabolic homeostasis is thus the most potential target to be modulated to resolve the therapeutic tolerability. Hence, in this article, a self-healable and pH-responsive spermidine/ferrous ion hydrogel loaded with CA inhibitor (acetazolamide, ACZ) and glucose oxidase (ACZ/GOx@SPM-HA Gel) was fabricated through the Schiff-base reaction between spermidine-dextran and oxidized hyaluronic acid, along with ferrous coordination.

Quantitative magnetic resonance imaging responses in head and neck cancer patients treated with magnetic resonance-guided hypofractionated radiation therapy.

Background And Purpose: Quantitative MRI (qMRI) has been explored for detecting tumor changes during radiation therapy (RT) in head and neck squamous cell cancer (HNSCC). Clinical trials show prolonged survival with PD-1 targeted immune checkpoint inhibition. Hypofractionated radiation regimens are being studied to counteract radioresistant clonogen formation.

Diversity, abundance of anopheline species, and malaria transmission dynamics in high-altitude areas of western Cameroon.

: Assessing vector bionomics is crucial to improving vector control strategies. Several entomological studies have been conducted to describe malaria transmission in different eco-epidemiological settings in Cameroon; knowledge gaps persist, particularly in highland areas. This study aimed to characterize malaria vectors in three localities along an altitudinal gradient in the western region: Santchou (700 m), Dschang (1400 m), and Penka Michel (1500 m).

Fibromuscular Dysplasia Clinical Phenotype Manifesting as a Distal Spontaneous Coronary Artery Dissection in a Middle-Aged Man.

Fibromuscular dysplasia (FMD) is a non-atherosclerotic, non-inflammatory vascular disease of medium-sized arteries that causes abnormal cellular growth in arterial walls and most commonly affects young to middle-aged women (20-50 years of age). While FMD often involves the renal arteries, it can affect any arterial bed. FMD has a characteristic angiographic appearance of a "string of beads.

The Association Between Venous Invasion and Distant Metastasis in Head and Neck Squamous Cell Carcinoma.

Background: In surgically treated cases of head and neck squamous cell carcinoma (HNSCC), even pathological N0 (pN0) cases according to the Tumor, Node, and Metastasis (TNM) Classification, distant metastases can occur relatively early postoperatively. Therefore, we hypothesized that hematogenous distant metastasis may be related to the degree of venous invasion. Lymphatic invasion is considered to be a poor prognostic factor in HNSCC, but knowledge about venous invasion is scarce.

Eosinophilic granulomatosis with polyangiitis; a distinctive presentation with myocarditis and autoimmune haemolytic anaemia: case report.

Background: Eosinophilic granulomatosis with polyangiitis (EGPA) is an extremely rare type of vasculitis characterized by inflammation within small blood vessels or tissues that may cause damage to the lungs, heart, kidneys, and other organs. Here, we present a rare case of EGPA with cardiac involvement that presented with acute heart failure.

Clinical Findings: A 44-year-old woman with a history of bronchial asthma and sinusitis presented with fever, shortness of breath, fatigue, unintentional weight loss, and polyarthritis.

Treatment of distal femur aseptic nonunion after lateral locking plate fixation: Results of medial custom made plating and free fibula flap transfer using CAD-CAM technology.

Background: Aim of the present paper is to report the preliminary results of CAD-CAM (Computer-Aided Design - Computer-Aided Manufacturing) technology application to distal femur nonunion treatment with free fibula flap, custom made medial plating and maintenance of a stable lateral locking plate.

Methods: Two cases of distal femur nonunion that occurred after lateral locking plating were treated and prospectively followed-up. Surgical planning followed the same preoperative protocol adopted for mandibular CAD-CAM reconstruction.

Risk Factors of Delirium Following Reconstructive Surgery for Head and Neck Tumors: A Retrospective Clinical Trial.

Background: Patients after head and neck tumor reconstruction surgery frequently require deep sedation and analgesia in the ICU. However, the risk factors for delirium associated with propofol-based sedation remain unclear.

Objective: The study aimed to explore the risk factors of delirium of propofol singled or combined sedation.

Pediatric Pilomatrixomas: Four Atypical Clinical Presentations.

Pilomatrixoma, also called Malherbe's calcifying epithelioma or pilomatrixoma, is a benign adnexal tumor that originates from keratinocytes (cells of the hair matrix, the internal sheath of the hair root or the cortex) and constitutes the second most prevalent skin neoplasm in children. These lesions are typically slow-growing, firm, nodules located on the head, neck, trunk, and extremities (in decreasing order of frequency). Due to the rarity, combined with their varied clinical presentations, pilomatrixomas are often misdiagnosed.

A Pilot Trial of Tongue Reconstruction Using the Chimeric Innervated Vastus Lateralis Muscle and Antero-Lateral Thigh Free Flap.

Background: Subtotal and total glossectomies for advanced tongue cancer result in significant speech- and swallow-related morbidity, impairing quality of life. This prospective pilot study compares the safety and functional outcomes associated with using a chimeric innervated muscle and fasciocutaneous flap for soft tissue reconstruction.

Materials And Methods: A prospective, non-randomized controlled pilot study evaluated a standardized technique for tongue reconstruction using a chimeric innervated vastus lateralis muscle and anterolateral thigh fasciocutaneous flap.

Iron-associated lipid peroxidation in Alzheimer's disease is increased in lipid rafts with decreased ferroptosis suppressors, tested by chelation in mice.

Introduction: Iron-mediated cell death (ferroptosis) is a proposed mechanism of Alzheimer's disease (AD) pathology. While iron is essential for basic biological functions, its reactivity generates oxidants which contribute to cell damage and death.

Methods: To further resolve mechanisms of iron-mediated toxicity in AD, we analyzed post mortem human brain and ApoEFAD mice.

Lingual Artery Identification for Ligation in Neck Dissection and Transoral Surgery for Oropharyngeal Tumors.

Objectives: Transoral robotic surgery (TORS) and transoral laser microsurgery (TOLM) plus neck dissection are viable alternatives to radiotherapy as a treatment modality in select cases of oropharyngeal squamous cell carcinoma. Many centers advocate for elective ligation of the feeding arteries at index neck dissection prior to TORS/TOLM to mitigate the risk of catastrophic perioperative hemorrhage. Although there are multiple cadaveric studies in the literature to identify the lingual artery at multiple points throughout its course, there are no studies on the intraoperative identification of the lingual artery for elective ligation prior to TORS/TOLM.

An Oxidative Stress Nanoamplifier to Enhance the Efficacy of Cisplatin in Head and Neck Cancer.

Cisplatin (CP) is a first-line platinum-based drug used for the treatment of head and neck cancer. However, tumor cells can diminish the therapeutic effects of CP through the detoxification system mediated by glutathione (GSH) and the nucleotide excision repair (NER) pathway. Herein, we present a light-activable and pH-responsive oxidative stress nanoamplifier (FPLC@IR OSNA), comprising an amphiphilic compound (FPLC) with Fmoc-lysine acting as a connector between a nitroimidazole derivative and a pH-responsive cinnamaldehyde (CA) derivative, loaded with photosensitizer IR780.

Every Face Has a Name: Individuation Training Reduces Implicit Racial Bias.

Addressing racial bias in early childhood is crucial for fostering inclusivity and reducing social inequalities. This study examined the effectiveness of individuation training in reducing racial bias among Canadian preschool-aged children and explored how interracial contact might influence changes in children's implicit anti-Black bias. A total of 113 preschool-age children (60 females, M = 5.

The impact of the COVID-19 pandemic on time to treatment in head and neck cancer management: a systematic review.

Background And Purpose: Coronavirus disease 2019 (COVID-19) caused a need for reorganization in the healthcare systems. First, we aimed to determine the impact of the COVID-19 pandemic on time to treatment in head and neck cancer (HNC) patients. Second, we aimed to determine the impact of COVID-19 on tumor stage and changes in treatment regimens used.

Pembrolizumab as first-line treatment for recurrent and metastatic head and neck cancer - real-world single-centre data.

Background And Purpose: The randomised clinical trial KEYNOTE-048 has demonstrated a significant increase in survival for patients with head and neck cancer treated with pembrolizumab with or without chemotherapy. The purpose of the present retrospective study was to investigate whether survival in a group of consecutive patients treated at our department was comparable to the results from KEYNOTE-048.

Patients/material And Methods: Seventy-six patients initiated treatment with pembrolizumab ± platinum/5-FU between July 2020 and May 2022.

Can hearing screening criteria at general health checkups be an indirect indicator of frailty and cognitive deficit in the older population? - with prevalence estimates based on updated World Health Organization hearing loss classification.

Aim: This study aimed to reestimate the prevalence of hearing loss based on the updated World Health Organization hearing loss classification and investigate whether existing hearing screening criteria could efficiently screen for frailty or cognitive deficit.

Methods: Data collected from community dwellers aged 40-91 years included 2325 samples. Health checkup hearing screening used were as follows: (A) 30 dB both at 1 and 4 kHz and (B) 30 dB at 1 kHz and 40 dB at 4 kHz were used.

Computed tomographic features of clinically suspected rhinitis in domestic rabbits (Oryctolagus cuniculus).

Background: The aim of this study was to characterise the computed tomographic (CT) findings in domestic rabbits with clinically suspected rhinitis and compare them with CT findings in rabbits without clinical signs of rhinitis.

Methods: CT images of rabbits that underwent a CT of the head were retrospectively reviewed and any CT abnormalities were described. Statistical analysis was performed to detect any association between the CT findings and clinical signs of rhinitis, and also to assess if there was any association between rhinitis and otitis media, otitis externa or dental disease.

Computed Tomographic Anatomy of the Head in Cockatiel (Nymphicus hollandicus).

Background: Nowadays, computed tomography (CT) scanning is one of the most practical and precise diagnostic imaging methods that can be utilized to evaluate the head in birds.

Objectives: This study aimed to present the normal anatomical data of the head of the cockatiel (Nymphicus hollandicus) using the CT method. In this research, the features of this bird's head were investigated in terms of bones, joints, muscles, sinuses and other constituent tissues.

Assessment of a New CT Detector and Filtration Technology: Part 1 - X-ray Beam Characterization and Radiation Dosimetry.

Purpose: This study evaluated beam quality and radiation dosimetry of a CT scanner equipped with a novel detector and filtration technology called PureVision Optics (PVO). PVO features miniaturized electronics, a detector cut with microblade technology, and increased filtration in order to increase x-ray detection and reduce image noise.

Methods: We assessed the performance of two similar 320-detector CT scanners: one equipped with PVO and one without.

Assessment of a New CT Detector and Filtration Technology: Part 2-Image Quality in Phantoms, Cadavers, and Patients.

Purpose: The purpose of this work was to evaluate the image quality of a commercial CT scanner equipped with a novel detector and filtration technology called PureVision Optics (PVO).

Methods: CT number, noise, contrast-to-noise ratio (CNR), modulation transfer function (MTF), and noise power spectrum (NPS) were assessed using the ACR CT Accreditation phantom scanned with various acquisitions at 80 kV, 100 kV, 120 kV, and 135 kV, each with multiple CTDIvol values of 20 mGy, 40 mGy, and 65 mGy. Artifacts were evaluated in an anthropomorphic head phantom, a cadaver head, and in patient studies.