[P20] Poster Session 20　Translational Research/Clinical Pharmacology（Basic science, Biomarker）

[P20-2] Observational study to evaluate RAS status in ctDNA for mCRC patients with RAS mutant tumor: RASMEX study（JACCRO CC-17）

^○Naoki Izawa¹, Yoshinori Kagawa², Hironaga Satake³, Yu Sunakawa¹, Masahiro Takeuchi⁴, Wataru Ichikawa⁵, Masashi Fujii⁶ (1.Department of Medical Oncology, St. Marianna University School of Medicine, 2.Department of Gastroenterological Surgery, Osaka General Medical Center, 3.Cancer Treatment Center, Kansai Medical University Hospital, 4.Graduate School of Mathematical Sciences, The University of Tokyo, 5.Division of Medical Oncology, Showa University Fujigaoka Hospital, 6.Department of Digestive Surgery, Nihon University School of Medicine)