After 14 days after the treatment, the tumour volumes for PBS, Ce6, chitosan + Ce6, catalase + Ce6 and C&C-Ce6 NPs were respectively 1.87±0.14 cm3, 1.04±0.09 cm3, 0.99±0.15 cm3, 0.96±0.12 cm3 and 0.52±0.11 cm3, in good agreement with in vitro results. Here, CAT is linked to neoplasm.