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Capecitabine

Irinotecan

Leucovorin

Fluorouracil

Oxaliplatin

Cola

Oxaliplatin 85 mg/m2 IV + Leucovorin 400mg/m2 IV + 5-Fluorouracil (5-FU) 400mg/m2 bolus + 5-Fluorouracil (5-FU) 2400mg/m2 IV continuous infusion over 46-48 hours (total dose) Day1 every 2 weeks for 6-12 cycles

OR

Oxaliplatin 130 mg/m2 IV Day 1 every 3 weeks + Capecitabine 1000 mg/m2 BID by mouth days 1-14 every 3 weeks for 4 cycles

Oxaliplatin 85 mg/m2 IV + Leucovorin 400mg/m2 IV + 5-Fluorouracil (5-FU) 400mg/m2 bolus + 5-Fluorouracil (5-FU) 2400mg/m2 IV continuous infusion over 46-48 hours (total dose) Day1 every 2 weeks for 12 cycles

OR

Oxaliplatin 130 mg/m2 IV Day 1 every 3 weeks + Capecitabine 1000 mg/m2 BID by mouth days 1-14 every 3 weeks for 8 cycles

Oxaliplatin 85 mg/m2 IV + Leucovorin 400mg/m2 IV + Irinotecan 150 mg/m2 IV continuous infusion (30-90 minutes) + 5-Fluorouracil (5-FU) 2400mg/m2 IV continuous infusion over 46-48 hours (total dose) Day1 every 2 weeks for 12 cycles

Signatera test

Oxaliplatin 85 mg/m2 IV + Leucovorin 400mg/m2 IV + 5-Fluorouracil (5-FU) 400mg/m2 bolus + 5-Fluorouracil (5-FU) 2400mg/m2 IV continuous infusion over 46-48 hours (total dose) Day1 every 2 weeks for 6-12 cycles

mFOLFOX6 3-6 month

Oxaliplatin 130 mg/m2 IV Day 1 every 3 weeks + Capecitabine 1000 mg/m2 BID by mouth days 1-14 every 3 weeks for 4 cycles

CAPOX 3 month

mFOLFIRINOX

Oxaliplatin 85 mg/m2 IV + Leucovorin 400mg/m2 IV + 5-Fluorouracil (5-FU) 400mg/m2 bolus + 5-Fluorouracil (5-FU) 2400mg/m2 IV continuous infusion over 46-48 hours (total dose) Day1 every 2 weeks for 12 cycles

mFOLFOX6 6 month

Oxaliplatin 130 mg/m2 IV Day 1 every 3 weeks + Capecitabine 1000 mg/m2 BID by mouth days 1-14 every 3 weeks for 8 cycles

CAPOX 6 month

Judy Langer, MD, MS

Langer

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Prajwol Pathak

Ahmed Abdalla

John A. Ellerton

Shahzad Siddique

Aaron J. Scott

Jay W. Carlson

Sohail A. Minhas

Jonathan A. Laryea

Gary L. Buchschacher

Tatjana Kolevska

Ricardo Salas

Jun Gong

Edward J. Kim

Richard T. Lee

Lisa Bailey

Bogdan S. Eftimie

Jason A. Zell

Chung-Tsen Hsueh

Sandra D. Algaze

Timothy E. Byun

Geetha N. Varma

Christopher H. Lieu

Alexander Menter

Christopher B. Jones

This Phase II/III trial will evaluate the what kind of chemotherapy to recommend to patients based on the presence or absences of circulating tumor DNA (ctDNA) after surgery for colon cancer.

Currently, there are no biomarkers validated prospectively in randomized studies for resected colon cancer to determine need for adjuvant chemotherapy. However, circulating tumor DNA (ctDNA) shed into the bloodstream represents a highly specific and sensitive approach (especially with serial monitoring) for identifying microscopic or residual tumor cells in colon cancer patients and may outperform traditional clinical and pathological features in prognosticating risk for recurrence. Colon cancer patients who do not have detectable ctDNA (ctDNA-) are at a much lower risk of recurrence and may not need adjuvant chemotherapy. Furthermore, for colon cancer pts with detectable ctDNA (ctDNA+) who are at a very high risk of recurrence, the optimal adjuvant chemotherapy regimen has not been established. We hypothesize that for pts whose colon cancer has been resected, ctDNA status may be used to risk stratify for making decisions about adjuvant chemotherapy.

Colon Adjuvant Chemotherapy Based on Evaluation of Residual Disease

TTPos is defined as time from randomization until ctDNA positive event: TTPos events are first ctDNA positive result after randomization for the immediate adjuvant chemo arm (Arm 1), 2nd ctDNA positive result after randomization for the delayed adjuvant chemo (Arm 2) and recurrence without a positive ctDNA result for both arms.

Time from randomization to first disease-free survival event (recurrence, second primary colorectal cancer or death from any cause).

percentage of patients with ctDNA positive results post-surgery at study entry.

Time from randomization to death of any cause.

Time from randomization to disease recurrence.

number of cycles of chemotherapy received.

Spots Global Cancer Trial Database for capox 3 month