Across the globe, children with RF-negative polyarticular JIA exhibit differences in clinical features, disease activity, and treatment patterns.

An ASA is defined as an immunoglobulin with antibody activity against a sperm antigen that plays a role in fertility, since not every antibody that binds to the sperm surface influences sperm ...

The most common autoimmune marker was anti-nuclear antibody (ANA) (22/36, 61%), followed by lupus anticoagulant (15/30, 50%) and any one marker of autoimmune thyroiditis, namely anti-thyroid ...

Clinical information at baseline was extracted from patient medical records, including age, sex, antinuclear antibodies (ANA) titer and fluorescence pattern, and other laboratory abnormalities.

ANA = antinuclear antibodies; SMA = smooth muscle antibodies; anti-LKM1 = antibodies to liver/kidney microsome type 1; AMA = antimitochondrial antibodies; IgG = serum immunoglobulin G level ...

1. Anti-PLA2R Antibody: A highly specific biomarker for primary membranous nephropathy (PMN), helping distinguish it from secondary causes without a biopsy. 2. ANA (Antinuclear Antibodies): Indicative ...