1
|
Grell P, Borilova S, Schwanzerova R, Kukolikova S, Dvorak J, Vocka M, John S, Buchler T, Selingerova I, Petruzelka LB, Vyzula R, Kiss I, Obermannova R. Factors associated with effectiveness of trifluridine/tipiracil versus regorafenib in patients with pretreated metastatic colorectal cancer (mCRC). J Clin Oncol 2020. [DOI: 10.1200/jco.2020.38.4_suppl.137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
137 Background: Trifluridine/tipiracil (T) and regorafenib (R) are indicated for patients with refractory mCRC. Currently, no biomarkers are used to select which patient will benefit from which treatment. Methods: We retrospectively evaluated 212 patients who received T and/or R. Different factors associated with progression-free survival (PFS) and overall survival (OS) were analyzed. Results: T received 132, R 52, both drugs 28 patients. Median age was 64 (range 28-83), male 64%, PS 0 37%, median line of treatment 3, characteristic was similar between treatment groups. Median follow-up was 16.5 months. Median OS for T was 10.2, for R 6.9 months, P = 0.03. Factors significantly associated with OS were: ≥ 24 months from diagnosis of mCRC (0.49, P < 0.001), PS 0 (HR 1.54, P = 0.007), baseline WBC < 8 × 109/L (HR 0.47, P < 0.001), normal baseline CRP (HR 0.47, P < 0.001), ≥ 3 months from last therapy (fluoropyrimidine for T, anti-VEGF for R) (HR 0.66, P = 0.006). We developed a scoring system TASREG from these factors, 1 point for each factor, the overall score was the sum of these points and patients were divided into 3 groups: high risk group with 0 to 1 point, intermediate with 2 to 3, favorable with 4 or more points. OS for all patients according to risk group was 4.6 for high risk, 7.9 intermediate, 11.8 months favorable risk (P < 0.001). Score was also significant for T and R group evaluated separately. Score was also significant for PFS. Factors associated with OS specific for T were neutropenia G≥2 (HR 0.34, P < 0.001); for R normal baseline LDH (HR 0,40. P < 0.001), no liver metastases (HR 0.45, P = 0.002), non-synchronous disease (HR 0,40, P < 0.001). Conclusions: We could find factors associated with better outcomes for both treatment groups and factors specific for T or R. TASREG is simple prognostic tool for patients with refractory mCRC.
Collapse
Affiliation(s)
- Peter Grell
- Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | | | | | | | - Josef Dvorak
- Charles University Medical School and Teaching Hospital, Hradec Kralove, Czech Republic
| | | | - Stanislav John
- Department of Oncology and Radiotherapy, Hradec Kralove, Czech Republic
| | - Tomas Buchler
- Department of Oncology, First Faculty of Medicine, Charles University and Thomayer University Hospital, Prague, Czech Republic
| | - Iveta Selingerova
- Regional Centre For Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | | | | | - Igor Kiss
- Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | | |
Collapse
|