Knee joint extension limitation in female patients with knee osteoarthritis affects the infrapatellar fat pad hardness and hemoglobin concentration by isometric quadriceps exercise.

Objective: To investigate whether there is a difference in hardness and hemoglobin concentration changes in the infrapatellar fat pad (IFP) during isometric quadriceps exercise (IQE) in patients with knee osteoarthritis (KOA) between those with and without knee extension limitation.

Design: In this cross-sectional study, data were collected at an orthopedic clinic from March 2022 to April 2023. Among patients diagnosed with KOA, those with knee joint extension range of motion <0° and >0° were defined as the limited group (n ​= ​16) and non-limited group (n ​= ​13), respectively.

Improvement of immunological tests for detecting autoantibodies in patients with lamina lucida-type linear IgA bullous dermatosis.

Background: In the diagnosis of linear IgA bullous dermatosis (LABD), detection of IgA at the epidermal basement membrane zone and circulating IgA autoantibodies are essential. The disease has two subtypes, lamina lucida-type and sublamina densa-type, with 120 kDa LAD-1 and 97 kDa LABD97 as major autoantigens for lamina lucida-type. Normal human epidermal keratinocytes (NHEK) and HaCaT cells are widely used for immunoblotting (IB) in the diagnosis process, but they do not provide high sensitivity and semiquantitative analysis.

Association Between Anterior Knee Pain and Soft Tissue Gliding of the Anterior Knee Region After Total Knee Arthroplasty: A Cross-Sectional Study.

Objective(s): To investigate the relationship between impaired gliding in the anterior knee region and anterior knee pain (AKP) in patients after total knee arthroplasty (TKA).

Design: Cross-sectional study.

Setting: Orthopedic hospital.

Relationship Between the Sagittal and Coronary Alignment of the Tibiofemoral Joint and the Medial Meniscus Extrusion in Knee Osteoarthritis.

: This study aims to clarify the reproducibility, validity, and accuracy of tibial external-rotation alignment evaluation using ultrasound imaging and to investigate the relationship between medial meniscus extrusion (MME) and tibiofemoral alignment in both the sagittal and coronal planes in knee osteoarthritis (OA). : Study 1 included 10 healthy participants. The tibial external-rotation angle was calculated using MRI.

Trunk Muscle Cross-Sectional Areas at Hip Fractures and Their Association With Recovery of Postoperative Gait Ability: A Multicenter, Retrospective Cohort Study.

Purpose: To determine the relationship between trunk muscle cross-sectional area (CSA) measured using trunk computed tomography at the time of injury and gait ability at discharge.

Methods: This multicenter retrospective cohort study was performed in comprehensive rehabilitation units of four hospitals in Japan. The study included 442 patients with hip fractures who underwent surgery (bipolar hip arthroplasty or open reduction and internal fixation) and were hospitalized for treatment between January 2020 and January 2023.