Figure 1From: Putative contribution of CD56 positive cells in cetuximab treatment efficacy in first-line metastatic colorectal cancer patients Sections of colorectal adenocarcinoma with results of the immunostaining: CD3, CD4, CD8, CD56, Foxp3 (magnification × 100). The CD56- section (magnification X40) reveals no CD56 positive immune cells (considered as NK negative tumor) but staining of Meisner plexus used as interne positive control.Back to article page