CRP and rheumatoid arthritis: The erythrocyte sedimentation rate (ESR) and the CRP (C-reactive protein) are commonly used in RA but have low sensitivity and specificity.[8] Therefore, new immune-based prognostic scores like monocyte/lymphocyte ratio (MLR), neutrophil/lymphocyte (NLR) platelet/lymphocyte ratio (PLR) are studied in RA.[9,10] Although each of these immune cells plays a role in inflammation, none of them is sufficient to detect inflammation alone.