Observational studyRMD open2025
Histological synovitis and radiographic damage in knee osteoarthritis: insights from a comprehensive analysis of ultrasound-guided synovial biopsies in 161 patients.
Observational study in RMD open, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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The trial behind it
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Who cites it
7 citing papers in PubMed.
- Circulating sTLR4 and sTREM-1 in Knee Osteoarthritis: Associations with Study-Specific MRI-Defined Categories and Disease Burden.Journal of clinical medicine · 2026Article
- Multimodality imaging considerations for genicular artery embolization in knee osteoarthritis.World journal of radiology · 2026Review
- Revisiting osteoarthritis as an inflammatory disease: characterization of synovitis grading and synovial pathotypes in surgical specimens.Arthritis research & therapy · 2026Article
- Disruption of proteoglycan 4 (PRG4)-CD44 signaling modulates chronic synovitis in conditionally inactivated mice.Arthritis research & therapy · 2026Article
- How Selective are Nanomaterials to Treat Osteoarthritis.International journal of nanomedicine · 2026Review
- Electroacupuncture attenuates synovitis in knee osteoarthritis and is associated with modulation of the protein S-TAM (Axl/MerTK)-Rac1 signaling axis.Frontiers in immunology · 2026Article
- Disruption of Proteoglycan 4 (PRG4)-CD44 Signaling Modulates Chronic Synovitis in Conditionally Inactivated Mice.Research square · 2025Article
Corrections and comments
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveSynovial inflammation plays a crucial role in osteoarthritis (OA) by producing key cytokines that mediate synovium-cartilage interaction and drive damage progression. In this study, we aimed to evaluate relationships between histological features of synovitis, radiographic damage and patients' clinical characteristics.
methodsThis observational cross-sectional study included consecutive patients with knee OA from 2016 to 2022. Enrolled patients were aged between 40 and 90 years, had chronic knee pain lasting at least 3 months and showed ultrasound evidence of synovitis. All patients underwent a general rheumatological evaluation, including the collection of clinical and laboratory data and ultrasound (US)-guided minimally invasive synovial tissue biopsy. The severity of synovitis was assessed by histology using the Krenn Synovitis Score (KSS).
resultsA total of 161 patients were considered for the analysis. The multivariate analysis showed that both US effusion and Kellgren-Lawrence (KL) grade were positively associated with histological synovitis. In contrast, age, sex, body mass index, levels of inflammatory markers, pain intensity and cardiovascular risk factors were not associated with histological synovitis. A strong positive correlation was found between KL grades and the KSS. A moderate positive correlation emerged between KL grades and the proportion of patients with lymphocytes and plasma cells in synovial tissue.
conclusionsMore severe histological synovitis in patients with non-end-stage knee OA is associated with worse radiographic structural damage. In the advanced stages of structural damage, the likelihood of detecting a lymphoplasmacytic inflammatory infiltrate in the synovial membrane increases. US-detected effusion serves as a marker of histological synovitis.
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