[P27] Poster Session 27　Gastrointestinal Cancer（Colorectal Cancer 1）

[P27-1] RAS status in ctDNA during chemotherapy for RAS mutant colorectal cancer: A retrospective study

^○Suguru Hirose, Toshikazu Moriwaki, Naoki Ishikawa, Taku Sawafuji, Rei Nomoto, Mamiko Shiroyama, Satoshi Fukuda, Soma Fukuda, Tsubasa Onoda, Yuya Hagiwara, Hirosumi Suzuki, Mariko Kobayashi, Takeshi Yamada, Yoshiyuki Yamamoto, Hideo Suzuki, Kiichiro Tsuchiya (Department of Gastroenterology, Faculty of Medicine, University of Tsukuba)