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Neutral wrist and hand bones appear beside two generic synovial-joint cutaways, one with bounded lining thickening.
Diseases7 sources

Rheumatoid Arthritis

Rheumatoid arthritis (RA) is a chronic systemic autoimmune disease characterized by symmetric polyarthritis with progressive joint destruction, affecting approximately 1% of the global population. The conventional framing centers on genetic susceptibility (HLA-DRB1 shar

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Mechanisms5 sources

Vitamin D

Vitamin D (calciferol; active form: calcitriol/1,25(OH)₂D₃) is a secosteroid hormone with profound immunomodulatory effects. The vitamin D receptor (VDR) is expressed on virtually all immune cells, and vitamin D deficiency is epidemiologically linked to autoimmune disea