Other fluorescent studies of tumor vasculature include combination with multispectral unmixing[326], the use of Cy5.5-labeled probe for CD13 expression on tumor neovessels[327], the use of a VEGF conjugated infrared dye[328], and the use of dynamic fluorescent imaging for monitoring vascular density, perfusion rate, and permeability, simultaneously[329]. Here, ANPEP is linked to neoplasm.