Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12967-023-03879-0/MediaObjects/12967_2023_3879_Fig2_HTML.png)
Different forms of soluble PD-L1 in patients with stage I-III colorectal cancer. a PD-L1 expression in exosomes characterized by transmission electron microscope (TEM), nanoparticle tracking analysis (NTA) and western blot (WB). b secPD-L1 level was significantly higher than exoPD-L1 (n = 30) and secPD-L1 was positively correlated to sPD-L1 (n = 60). R and P were calculated by Spearman correlation