IFNG and neoplasm: We observed that IFN-γ neutralization significantly impaired the antitumor effects of ATO, evidenced by a significant acceleration in tumor volume and tumor weight compared to the ATO + IgG group (Figures 4P and 4Q, p < 0.005 and p < 0.01, respectively), indicating that IFN-γ secretion is (partly) required to slow tumor growth upon ATO treatment.