A single center survival analysis of patients with colorectal cancer who underwent next generation sequencing.

Authors

null

Lucyna Krzywon

Experimental Surgery Department, McGill University, Montreal, QC, Canada;

Lucyna Krzywon , Anthoula Lazaris , Andrea Gomez , Jennifer Kalil , Oran Zlotnik , Peter Metrakos

Organizations

Experimental Surgery Department, McGill University, Montreal, QC, Canada; , Research Institute, McGill University Health Centre, Montreal, QC, Canada; , McGill University Genome Center, Montreal, QC, Canada; , McGill University, Montreal, QC, Canada; , McGill University Health Centre, Montreal, QC, Canada;

Research Funding

No funding received
None.

Background: Colorectal cancer (CRC) remains a lethal diagnosis with an overall 5-year survival rate of 5-10% for patients with unresectable metastatic disease. The advent of next generation sequencing allows tailored systemic therapy to specific mutations with the goal of improving patient survival. McGill University Health Center instituted next generation sequencing in 2019. Our study aims to evaluate survival outcomes in patients who underwent NGS testing. Methods: A retrospective collection of data on all patients with CRC who were presented at both lower gastroenterology and hepatobiliary tumor boards from January 2019 through July 2022 (n= 498). Survival and was compared between patients who were found to have genetic alterations identified using the Illumina Miseo platform. Statistical Analysis was performed with GraphPad Prism. Results: A total of 321 (64%) patients had NGS performed on either their primary tumor or a metastasis. A total of 229 (71%) CRC patients had genetic alterations identified on NGS. The most commonly mutated genes were KRAS (41%), APC (17%), PIK3CA (16%) and BRAF (8%). There was no significant difference in median overall survival between patients who had an identified genetic alteration and patients who did not (p = 0.8). Patients with metastatic disease and synchronous presentation had higher rates of genetic alterations (69% and 70%, respectively). Conclusions: This study provides real world data for a single institution initiating Next generation sequencing in colorectal cancer patients. Next Generation testing is an advantageous tool which can help stratify patients into tailored treatment regiments which will lead to improved patient outcomes.

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Abstract Details

Meeting

2023 ASCO Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session C: Cancers of the Colon, Rectum, and Anus

Track

Colorectal Cancer,Anal Cancer

Sub Track

Diagnostics

Citation

J Clin Oncol 41, 2023 (suppl 4; abstr 31)

DOI

10.1200/JCO.2023.41.4_suppl.31

Abstract #

31

Poster Bd #

B6

Abstract Disclosures

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