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. 2020 Feb 5;12:841–854. doi: 10.2147/CMAR.S240773

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© 2020 He et al.

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PD-L1 expression and CTC cluster analysis. (A) PD-L1 expression in tumor tissue. (B) PD-L1 expression in CTC of cancer patients (bar = 10 μm). (C) Immuno-staining differentiates PD-L1 expression in positive and negative control (bar = 10 μm). (D) Represent CTC cluster in patients. (E) Detection rate, CTC cluster rate and PD-L1 positive rate (≥1 PD-L1+ CTC) of lung cancer patients.