Fig. 4

Irradiated and non-irradiated melanoma cells survive in 3D experimental skin models. S100 identifies melanoma cells (brown), and the arrows indicate positive staining. a, c and e Cross-sections through 3D experimental skin models initialised with 1250, 5000 and 8500 non-irradiated melanoma cells, as indicated. b, d, and f Cross-sections through 3D experimental skin models initialised with 1250, 5000 and 8500 irradiated melanoma cells, respectively. Scale bar in each image is 100 μm