“…S-1 is an oral anticancer drug composed of tegafur, gimeracil, and oteracil in a molar ratio of 1:0.4:1. [3] Among the agents used to treat ARCC (paclitaxel, [4,5] topotecan, [6,7] irinotecan, [8,9] vinorelbine, [10] capecitabine, [11,12] ifosfamide, [13,14] and S-1), [15,16] S-1 is amongst the most active, with an overall response rate (ORR) of 36.6% and a median survival time following S-1 treatment of 15.4 months. [17] Although encouraging, these findings were obtained in a study that only included patients with no or one prior chemotherapy treatment; consequently, 48.3% of the patients in the study received S-1 in the initial stages of ARCC.…”