Posterior capsular release improves intraoperative flexion contracture without affecting knee kinematics in posterior-stabilized total knee arthroplasty.

Objectives: Posterior capsular release (PCR) is widely performed in total knee arthroplasty (TKA) for late-stage knee osteoarthritis with severe flexion contracture. PCR enables obtaining an appropriate bone gap, resulting in an improvement in the knee extension angle after TKA. Despite its efficacy, little is known about its influence on knee kinematics.

Mid-term Outcomes of Distal Tibial Oblique Osteotomy for Rheumatoid Arthritis-Associated Ankle Arthropathy: A Comparison with Osteoarthritis Outcomes.

Background: Distal tibial oblique osteotomy (DTOO) has traditionally been contraindicated in patients with rheumatoid arthritis (RA). However, with advances in RA treatment, an increasing number of patients present with arthritis resembling osteoarthritis (OA), suggesting DTOO as a potential option. This study aimed to compare mid-term clinical and radiographic outcomes of DTOO between the patients with OA and RA.

Pulmonary Enteric Adenocarcinoma in a Super-Elderly Patient: A Case Report and Literature Review.

Pulmonary enteric adenocarcinoma (PEAC) is an extremely rare subtype of non-small cell lung cancer, characterised by histopathological features that resemble colorectal adenocarcinoma. Here, we report a case of PEAC in an 85-year-old male who presented with a pulmonary nodule initially identified at the age of 76. Initial PET-CT (maximum standardised uptake value [SUVmax] = 2.

Simultaneous bilateral surgery for accessory naviculars does not have a negative effect on postoperative outcome.

Accessory navicular tends to occur bilaterally; however, unilateral surgery is performed more often than simultaneous bilateral surgery. The purpose of this study was to compare the clinical outcomes of unilateral and simultaneous bilateral surgeries. Between 2018 and 2022, 42 feet in 26 patients underwent resection for a type-II symptomatic accessory navicular.

Does Colorectal Stenting as a Bridge to Surgery for Obstructive Colorectal Cancer Increase Perineural Invasion?

[This corrects the article DOI: 10.23922/jarc.2023-057.

Dissecting Tumor Size Underestimation in Pancreatic Cancer: A Comparative Analysis of Preoperative Treatments.

Background: Tumor size (TS) in pancreatic ductal adenocarcinoma (PDAC) is one of the most important prognostic factors. However, discrepancies between TS on preoperative images (TSi) and pathological specimens (TSp) have been reported. This study aims to evaluate the factors associated with the differences between TSi and TSp.

Volume and quality of the gluteal muscles are associated with early physical function after total hip arthroplasty.

Purpose: Identifying muscles linked to postoperative physical function can guide protocols to enhance early recovery following total hip arthroplasty (THA). This study aimed to evaluate the association of preoperative pelvic and thigh muscle volume and quality with early physical function after THA in patients with unilateral hip osteoarthritis (HOA).

Methods: Preoperative Computed tomography (CT) images of 61 patients (eight males and 53 females) with HOA were analyzed.

Lyme neuroborreliosis in Japan: Borrelia burgdorferi sensu lato as a cause of meningitis of previously undetermined etiology in hospitalized patients outside of the island of Hokkaido, 2010-2021.

Background And Purpose: Clinical manifestations of Lyme borreliosis (LB), caused by Borrelia burgdorferi sensu lato (Bbsl), include erythema migrans, Lyme neuroborreliosis (LNB), carditis, and arthritis. LB is a notifiable disease in Japan with <30 surveillance-reported LB cases annually, predominately from Hokkaido Prefecture. However, LB, including LNB, may be under-diagnosed in Japan since diagnostic tests are not readily available.

Evaluation of (Shared) Autonomy in Robot-Assisted Vitreoretinal Surgery Using a Surgical Model.

Background: Robot-assisted vitreoretinal surgery makes it easier for the surgeons to perform precise and dexterous manipulations required in vitreoretinal procedures.

Methods: We systematically evaluated manual surgery, conventional two-hand teleoperation, a novel one-hand teleoperation, and automation in a needle positioning task using a realistic surgical eye model, measuring the expert surgeon's performances and the novice's learning curves.

Results: The proposed one-hand teleoperation improved the positioning accuracy of expert surgeons , enabled novices to achieve a consistent accuracy more quickly , decreased the novice's workload more quickly , and made it easier for novices to learn to conduct the task quickly .

Comparing cup placement, leg length, and offset discrepancy after total hip arthroplasty between CT-based robotic arm-assisted and navigation systems.

Aims: Excellent outcomes have been reported following CT-based robotic arm-assisted total hip arthroplasty (rTHA) compared with manual THA; however, its superiority over CT-based navigation THA (nTHA) remains unclear. This study aimed to determine whether a CT-based robotic arm-assisted system helps surgeons perform accurate cup placement, minimizes leg length, and offsets discrepancies more than a CT-based navigation system.

Methods: We studied 60 hips from 54 patients who underwent rTHA between April 2021 and August 2023, and 45 hips from 44 patients who underwent nTHA between January 2020 and March 2021 with the same target cup orientation at the Department of Orthopedic Surgery at Ozu Memorial Hospital, Japan.

Improved visibility of palisade vessels within Barrett's esophagus using red dichromatic imaging: a retrospective cross-sectional study in Japan.

Background/aims: Visualization of palisade vessels (PVs) in Barrett's esophagus is crucial for proper assessment. This study aimed to determine whether red dichromatic imaging (RDI) improves PV visibility compared with white-light imaging (WLI) and narrow-band imaging (NBI).

Methods: Five expert and trainee endoscopists evaluated the PV visibility in Barrett's esophagus using WLI, NBI, and RDI on 66 images from 22 patients.

[Franz Joseph Haydn and Subcortical Vascular Encephalopathy].

Franz Joseph Haydn was a prominent musician in the late 1700s. Researchers have speculated that Haydn may have suffered from subcortical cerebrovascular disease. These interpretations, based on biographical and other sources, might be accurate.

A Case of Olmesartan-associated Gastritis Observed Over Time.

A 61-year-old woman who had been taking olmesartan for 7 years complained of epigastric pain, diarrhea, loss of appetite, and weight loss. Esophagogastroduodenoscopy revealed roughened mucosa and erosions in the stomach and duodenum. An endoscopic biopsy failed to identify the cause of the mucosal disorder.

Preoperative tibiofemoral contact point on standing lateral radiograph predicts anteroposterior knee kinematics in total knee arthroplasty.

Purpose: This study investigated the tibiofemoral contact point (CP) on standing lateral radiographs in knee osteoarthritis and assessed the relationship between CP and pre- and postoperative knee kinematics in total knee arthroplasty (TKA).

Methods: The intraoperative knee status of 46 knees with varus deformity that underwent bicruciate stabilized TKA using a navigation system was investigated. The intraoperative anteroposterior (AP) position of the femur relative to the tibia at maximum extension, 15°, 30°, 45°, 60° and 90° was evaluated by the navigation system before and after TKA.

A Retrospective Cohort Study of a Newly Proposed Criteria for Sporadic Creutzfeldt-Jakob Disease.

Background/objectives: Sporadic Creutzfeldt-Jakob disease (sCJD) is a fatal neurodegenerative disorder traditionally diagnosed based on the World Health Organization (WHO) criteria in 1998. Recently, Hermann et al. proposed updated diagnostic criteria incorporating advanced biomarkers to enhance early detection of sCJD.

Ultrasound Imaging for the Evaluation of Anterior Talofibular Ligament Remnants in 547 Ankles With Chronic Lateral Ankle Instability.

Background: There are few reports on the intra- and interobserver agreement and parameters for the diagnostic accuracy of ultrasound (US) imaging for chronic lateral ankle instability (LAI). The purpose of this study was to investigate the reliability and validity of US imaging for identifying anterior talofibular ligament (ATFL) remnants in patients with LAI.

Methods: A total of 547 ankles from 406 patients underwent surgery for LAI between 2019 and 2022.

Left ventricular perforation by Impella 5.5 during surgery for postinfarction ventricular septal rupture.

Background: The perioperative use of the Impella 5.5 has been increasing recently; however, the left ventricular perforation by this device during surgery has not been reported to date.

Case Presentation: Postinfarction ventricular septal rupture in a 75-year-old man was successfully repaired with support of a single Impella 5.

Artificial intelligence-based analysis of lower limb muscle mass and fatty degeneration in patients with knee osteoarthritis and its correlation with Knee Society Score.

Purpose: Lower-limb muscle mass reduction and fatty degeneration develop in patients with knee osteoarthritis (KOA) and could affect their symptoms, satisfaction, expectation and functional activities. The Knee Society Scoring System (KSS) includes patient reported outcome measures, which is widely used to evaluate the status of knee function of KOA. This study aimed to clarify how muscle mass and fatty degeneration of the lower limb correlate with the KSS in patients with KOA.

CLCN2-related leukoencephalopathy with novel compound heterozygous variants followed with magnetic resonance imaging over 17 years: a case report.

Background: CLCN2-related leukoencephalopathy (CC2L) is a rare autosomal recessive disorder caused by biallelic variants of CLCN2, which encodes chloride channel 2. Although CC2L is associated with distinct radiological features, it presents with a wide range of clinical features.

Case Presentation: A 34-year-old woman presented to our hospital with a sudden onset of vertigo with headache.