PDP1 and neoplasm: The increased fractional tumor coverage at 1 h following Cet-IRDye800 administration provided by PDP was not significantly improved by waiting for an additional 47 h, either with or without PDP treatment (Figure 6C). This suggests that the homogeneity of tumor tissue coverage by Cet-IRDye800 at 1h post-administration is optimal when the tumors were primed by PDP, thereby enabling IGS at shorter time-periods with greater probability of complete tumor resection.