ALB and neoplasm: It has been suggested that the observed selectivity and strong retention of such tumor‐seeking meso‐Cl dyes is caused by a combination of overexpression of albumin receptors on tumor cells and the EPR effect.[27b] Other fluorophore–albumin conjugates have been reported to behave similarly and have been investigated for their use as imaging agents in the treatment of various cancers.[62] Lin et al.