Lymph node of a mouse in which lymphatic vessels (green) and tumor exosomes (red) that will direct the early stages of melanoma metastasis are visualized Disclaimer: AAAS and EurekAlert!

A mouse lymph node from young mouse fourteen days after immunisation. B cell follicles are shown in yellow (IgD) and proliferating germinal centre cells (Blue, Ki67) are shown within the B cell ...