Definition

An immunoconjugate and a fluorescent tracer consisting of the recombinant humanized anti-vascular endothelial growth factor (VEGF) monoclonal antibody bevacizumab conjugated to the N-hydroxysuccinamide (NHS) ester form of the near-infrared (NIR) fluorescent dye IRDye 800CW, that may be used for VEGF-specific tumor imaging. Upon administration, the bevacizumab moiety of bevacizumab-IRDye 800CW binds to VEGF and the fluorescent signal can be visualized using NIR fluorescence imaging (700–1,000 nm).