PTPRC and Arthritis: The percentages of monocytes/macrophages (CD11b+Ly-6G-Ly-6C+) [65] and neutrophils (CD11b+Ly-6G+) among CD45+ cells were significantly (p = 0.0001 and p = 0.002 respectively) and positively correlated with arthritis score (Fig 6E and 6F).