VEGFR-3 is one of the most used markers for lymphatic endothelial cells in breast cancer tissues, but there are also other proteins reported to be specific for lymphatic vessels such as podoplanin, lymphatic vessel endothelial hyaluronic acid receptor-1 (LYVE-1), and prospero-related homeobox-1 (PROX-1) [96,97]. Here, PROX1 is linked to breast carcinoma.