Epigallocatechin gallate with photodynamic therapy enhances anti-tumor effects in vivo and in vitro

•To evaluate anti-tumor effects of combined photodynamic therapy and epigallocatechin-3-gallate (EGCG).•The cell growth and the tumor volume in PDT combined with EGCG treatment group was significantly suppressed, compared with control and PDT or EGCG alone treated groups.•It is suggested that high anti-cancer activity of combined photodynamic therapy with EGCG may be useful for effective cancer therapy.