ALB and neoplasm: After 24 h, noninvasive NIR fluorescence imaging was still able to identify the same 12 draining lymph nodes (parotid and caudal mandibular lymph nodes) in six of six tumours (100%) injected with nanocolloidal albumin-IRDye 800CW, without a decrease in signal intensity and without an increase in background fluorescence (Fig. 2c).