TY - JOUR T1 - Retrospective Comparison of mFOLFOXIRI With XELOX/SOX as Neoadjuvant Chemotherapy for Locally Advanced Rectal Cancer JF - In Vivo JO - In Vivo SP - 977 LP - 985 DO - 10.21873/invivo.12340 VL - 35 IS - 2 AU - HIROYUKI KODAMA AU - TETSUJI TERAZAWA AU - YASUNOBU ISHIZUKA AU - HIROKI YUKAMI AU - MASAHIKO AOKI AU - TAKAHIRO MIYAMOTO AU - TOSHIFUMI YAMAGUCHI AU - FUTUKARO SHIMAMOTO AU - TAKAYUKI KII AU - MASAHIRO GOTO AU - HIROKI HAMAMOTO AU - WATARU OSUMI AU - MASASHI YAMAMOTO AU - KEITARO TANAKA AU - JYUNJI OKUDA AU - KAZUHISA UCHIYAMA AU - KAZUHIDE HIGUCHI Y1 - 2021/03/01 UR - http://iv.iiarjournals.org/content/35/2/977.abstract N2 - Background/Aim: Neoadjuvant chemotherapy without radiation (NAC) shows favorable outcomes for locally advanced rectal cancer (LARC), however, the optimal regimen has not been determined yet. This study aimed to compare the efficacy and safety of oxaliplatin, irinotecan, folinic acid, and 5-fluorouracil (mFOLFOXIRI) with capecitabine/S-1 and oxaliplatin (XELOX/SOX) in rectal cancer patients. Patients and Methods: We retrospectively examined patients with LARC who received mFOLFOXIRI or XELOX/SOX as NAC. Results: Between January 2015 and July 2019, 49 patients received mFOLFOXIRI and 37 patients received XELOX/SOX. The pathological response rates (over two-thirds affected tumor area) were 36.7% and 40.5% in the mFOLFOXIRI and XELOX/SOX groups, respectively. Grade 3/4 neutropenia was experienced by 45.0% of the patients in the mFOLFOXIRI group and 8.0% in the XEOX/SOX group. Conclusion: Although pathological responses were comparable between two groups, mFOLFOXIRI tended to be more toxic compared to XELOX/SOX as NAC for LARC. ER -