Moreover, Zhang et al., using synovial tissue from patients with RA or osteoarthritis (OA), analysed CD45-Podoplanin+ cells with mass cytometry and found eight putative cell clusters with differential protein levels of CD90, CD34, and cadherin-11.20 However, this finding has not been explored in the peripheral blood. The gene discussed is CDH11; the disease is rheumatoid arthritis.