Melanoma cells with the cell membrane protein CD44 stained in red and the nucleus in blue. Dil-labelled extracellular vesicles taken up by cancer cells are shown in green. Image by Kaisa Mäki-Mantila. Pro-inflammatory macrophages may do more than mark an inflamed tumour microenvironment; they may help drive melanoma toward a more invasive phenotype, according to new data from the University of Eastern Finland. The findings, published in Cell Communication and Signaling , posi