CD4 and posterior cortical atrophy: Furthermore, we investigated the quantitative distribution of a large panel of leukocyte subset markers in PCa and CP tissue, including CD68 (macrophages), CD8 (cytotoxic T-lymphocytes), CD4 (T-helper cells), CD20 (B-lymphocytes), NCL-PC (plasma cells), neutrophil elastase, proteogylcan 2 / PRG2 (eosinophils) and anti-mast cell (MC) tryptase and chymase within neural inflammatory clusters.