The natural history of marginal erosions in hands with and without osteoarthritis.

Sharma HA, McAlindon TE, Roberts MB, Haugen IK, Lo GH, Duryea J, Schaefer LF, Smith SE, Eaton CB, Driban JB. The natural history of marginal erosions in hands with and without osteoarthritis. Clinical Rheumatology. 2024 Oct 1; 43(10):3239-3248.

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Abstract:

INTRODUCTION/OBJECTIVES: Among people with or without hand osteoarthritis, we aimed to identify characteristics of people (e.g., age and gender) with marginal erosions (MEs). We also examined changes in MEs during 48 months. We described radiographic severity and progression among joints with MEs, changes in MEs, or central erosions (CEs). DESIGN: We studied participants from the Osteoarthritis Initiative with baseline and 48-month hand radiographs. A radiologist and rheumatologist evaluated the radiographs for disease severity (Kellgren-Lawrence grades) and erosions (central or marginal), respectively. We used descriptive statistics to characterize participants and calculated frequencies at the joint level. RESULTS: Of the 3558 participants, 89 had a ME at baseline. People with MEs were more often male, older, and ever (former and current) smokers than those without a ME. There was no difference in inflammatory biomarkers or the presence of hand pain between individuals with and without a baseline ME. Almost all hands had only one ME (80%), whereas only 50% of individuals with CEs had only one CE at baseline. Compared to CEs, MEs appeared more frequently in joints without osteoarthritis (54% vs. < 1%). Approximately 18% of joints with an ME progressed in Kellgren-Lawrence grade versus 4% without ME. Among the joints with an ME at baseline, 10% resolved by 48 months. Less than 0.1% of joints developed a new ME. CONCLUSION: MEs appear to be distinct from CEs. MEs are predominantly present in males, isolated to one specific joint without osteoarthritis within a hand, and possibly predictive of radiographic progression. Key Points - Marginal erosions appear to be distinct from central erosions. - Most marginal erosions occur in joints without radiographic osteoarthritis. - Radiographic progression but not hand pain is more common in joints with a marginal erosion than without one.