Fig. 4
From: PD-L1 expressing circulating tumour cells in head and neck cancers
CTC clusters detected after enrichment using spiral microfluidics. a 200X magnification composite PD-L1/DAPI (b) CTC cluster magnified (1000X) showing individual and composite images for DAPI, EGFR, PD-L1 and PD-L1/DAPI. c 1000X magnification of a further CTC cluster present in the same patient characterized for the same cellular markers. Scale bar represents 100 μm