Pusan National University Yangsan Hospital

Association of the COVID-19 lockdown and Generalized Anxiety Disorder-7 (GAD-7) in Korean adolescents

Coronavirus disease 2019 (COVID-19) is a worldwide pandemic that causes anxiety. Research on possible risk factors for anxiety during the COVID-19 pandemic is scarce. In this study, we examined 54,890 participants’ web-based self-reported data from the Korea Youth Risk Behavior W...

Comparative Analysis of Cotton- and Flocked-Swab-Based Culture Methods in Bacterial Keratitis

Purpose: To compare the diagnostic performance of flocked-swab and cotton-swab culture methods in patients with bacterial keratitis.Methods: Twentytwo patients diagnosed with bacterial keratitis between May 2024 and August 2025 were included. Corneal specimens were collected usin...

Clinical Characteristics and Outcomes of Pediatric Patients With Long QT Syndrome: A Korean Multicenter Cohort Study

This multicenter nationwide cohort study comprehensively analyzed the clinical features, genetic architecture, and outcomes of Korean pediatric patients with long QT syndrome (LQTS).Prolonged QT intervals, fetal arrhythmia, and LQT2/3 genotypes compared to LQT1 were independent r...

Impact of intertrochanteric bone mineral density on the accuracy of preoperative templating in cementless total hip arthroplasty: a retrospective cohort study of 510 hips

Abstract Background Preoperative templating accuracy in cementless total hip arthroplasty (THA) may be influenced by patient-specific and radiographic factors, yet bone quality has rarely been considered. We hypothesized that bone mineral density (BMD), and particularly intertroc...

Integrative Genomic Analysis Reveals Molecular and Clinical Disparities between Bladder and Upper Tract Urothelial Carcinoma in K-MASTER Program

Purpose: The clinical outcome of urothelial carcinoma presents significant variability, reflecting its molecular composition, epidemiologic attributes, and primary site of origin. Despite histological similarities, upper tract urothelial carcinoma (UTUC) and bladder urothelial ca...

Accuracy of Pedicle Screw Placement at the Cervicothoracic Junction (C7–T2) : A Comparative Study of O-arm Navigation versus C-arm Fluoroscopy

Objective: To compare pedicle screw accuracy at the cervicothoracic junction (CTJ; C7-T2) between O-arm navigation and C-arm fluoroscopy and identify level-specific malposition mechanisms through quantitative trajectory analysis. Methods: We retrospectively reviewed 187 screws in...