Representative images of pulmonary metastatic foci.

<p>Shortly after mice were sacrificed, lungs were entirely resected and were fixed in formalin, histological slices were manufactured. (a) and (b) are the representative H&E staining images of pulmonary metastatic foci of LDA group and HDA group, respectively (200×); (c) and (d) are the images of control group, illustrating representative pulmonary metastatic colonizations and intravascular tumor embolus, respectively (200×).