VCAM-1 expression is associated with myeloid cell recruitment.Cx₃cr1^gfp/+ (left panels; green, myeloid cells) or Csf1r-GFP mice (right panels; green, myeloid cells) were injected intravenously with 5 × 10⁵ CMRA-stained B16F10 or -Met-1 cells, respectively (magenta). Eight hours later, lungs were harvested and assessed by immunohistochemistry for VCAM-1 expression (red, Alexa Fluor 633). Representative images, acquired with a confocal microscope from 3 independent experiments performed, are shown. Scale bars represent 50 µm.