RT Journal Article T1 Early Clinical Experience with Trifluridine/Tipiracil for Refractory Metastatic Colorectal Cancer: The ROS Study A1 Garcia-Alfonso, Pilar A1 Muñoz, Andres A1 Jimenez-Castro, Jeronimo A1 Jimenez-Fonseca, Paula A1 Pericay, Carles A1 Longo-Muñoz, Federico A1 Reyna-Fortes, Carmen A1 Argiles-Martinez, Guillem A1 Gonzalez-Astorga, Beatriz A1 Gomez-Reina, Maria Jose A1 Ruiz-Casado, Ana A1 Rodriguez-Salas, Nuria A1 Lopez-Lopez, Rafael A1 Carmona-Bayonas, Alberto A1 Conde-Herrero, Veronica A1 Aranda, Enrique K1 Biomarkers K1 Chemotherapy K1 Colorectal cancer K1 Combination therapy K1 Real-life K1 Trifluridine/tipiracil AB Trifluridine/tipiracil is currently approved for metastatic colorectal cancer (mCRC) refractory to available therapies. However, there is no consensus on factors that predict treatment outcomes in daily practice. We assessed the early clinical experience with trifluridine/tipiracil in Spain and potential survival markers. This was a retrospective cohort study of mCRC patients who participated in the trifluridine/tipiracil early clinical experience programme in Spain. The primary outcome was overall survival (OS). Associations between OS and patient characteristics were assessed using multivariate Cox regression analyses. A total of 379 patients were included in the study. Trifluridine/tipiracil was administered for a median of 3.0 cycles and discontinued mainly due to disease progression (79.2%). The median OS was 7.9 months, with a 12-month OS rate of 30.5%. Cox analyses revealed that the following variables independently enhanced OS: ≤2 metastatic sites, no liver metastasis, alkaline phosphatase < 300 IU, trifluridine/tipiracil dose reductions, and neutrophil/lymphocyte ratio < 5. Grade ≥ 3 toxicities were reported in 141 (37.2%) patients, including mainly afebrile neutropaenia (23.2%), anaemia (12.1%), and thrombocytopaenia (5.3%). This study supports the real-life efficacy and safety of trifluridine/tipiracil for refractory mCRC and identifies tumour burden, liver metastasis, alkaline phosphatase, dose reductions, and neutrophil/lymphocyte ratio as survival markers. PB MDPI YR 2021 FD 2021-09-08 LK http://hdl.handle.net/10668/3928 UL http://hdl.handle.net/10668/3928 LA en NO García-Alfonso P, Muñoz A, Jiménez-Castro J, Jiménez-Fonseca P, Pericay C, Longo-Muñoz F, et al. Early Clinical Experience with Trifluridine/Tipiracil for Refractory Metastatic Colorectal Cancer: The ROS Study. Cancers. 2021 Sep 8;13(18):4514 NO This work was supported by the Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD) through a grant provided by Laboratorios Servier S.L. (grant reference number: not applicable) DS RISalud RD Apr 12, 2025