“…Today the presence of CD45, CD34, or other myeloid antigen like CD11b and CD13 is considered to discriminate fibrocytes from leukocytes. Fibrocytes still do not express large amount of ECM (Chesney et al, 1998), however they produce ECM degrading enzymes, such as MMP9 (García-de-Alba et al, 2010). Fibrocytes can differentiate into myofibroblast in vivo (Mori et al, 2005;Schmidt et al, 2003).…”