Conference Proceedings

A pooled analysis of multicenter cohort studies of post-surgery circulating tumor DNA (ctDNA) in early stage colorectal cancer (CRC).

Jeanne Tie, Joshua Cohen, Yuxuan Wang, Lu Li, Margaret Lee, Rachel Wong, Suzanne Kosmider, Hui-Li Wong, Belinda Lee, Matthew E Burge, Desmond Yip, Christos Stelios Karapetis, Timothy Jay Price, Niall C Tebbutt, Andrew Mark Haydon, Cristian Tomasetti, Nickolas Papadopoulos, Kenneth W Kinzler, Bert Vogelstein, Peter Gibbs

JOURNAL OF CLINICAL ONCOLOGY | AMER SOC CLINICAL ONCOLOGY | Published : 2019

Abstract

3518 Background: Studies in multiple tumor types have demonstrated the prognostic impact of ctDNA analysis after curative intent surgery. Emerging data suggest that conversion of ctDNA from detectable to undetectable after adjuvant chemotherapy may reflect treatment efficacy. Further review of existing study data could increase the precision of ctDNA guided adjuvant therapy decision making. Methods: We combined individual patient (pt) data from three independent prospective cohort studies that enrolled 485 pts with stage II or III CRC. Clinicians were blinded to ctDNA results. We evaluated pt outcomes over a 5-year follow-up period (median, 47.2 months). Plasma samples were collected 4 to 1..

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