CCR6 and neoplasm: Figure 1G (X10) represents low to medium expression of CCR6 by tumor cells and Figure 1H (X20) demonstrates high CCR6 expression; in these samples, some of the tumor cell nuclei also stained positive for CCR6. Immune cell infiltrates located within lung adenocarcinoma tumor stained positive for CCR6 (X40) (Figure 1I). Negative control staining (X10) is shown in Figure 1C.