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Expert Discusses CRC Developments, Importance of Molecular Profiling

Caroline Seymour
Published: Sunday, Feb 03, 2019

Pashtoon M. Kasi, MD, MBBS, MS

Pashtoon M. Kasi, MD, MBBS, MS

Liquid biopsies may not be ready for prime time use in colorectal cancer (CRC), but they stand to show the importance of identifying clinically relevant mutations that can direct future treatment decisions, said Pashtoon M. Kasi, MD, MBBS, MS.

, Kasi, an assistant professor of oncology and senior associate consultant in the Division of Hematology/Oncology at Mayo Clinic, provided an overview of the potential for liquid biopsies in CRC and advances being made in the treatment landscape.  

OncLive: Where do liquid biopsies stand in CRC?

Kasi: Liquid biopsies are done through circulating tumor DNA testing; it’s something that has rapidly made its way into research and is now making its way into practice. The most recent guidelines that came from the 2018 ASCO [Board of Directors] meeting in March 2018 are showing promise; however, they’re not ready for prime time. The only FDA-approved indication for liquid biopsies is in the sphere of lung cancer.

fusion–positive patients, which constitute about 1% to 2% of CRCs as well. 

Could you elaborate on ongoing research efforts in this area?

One of the most exciting things, in terms of the use of this approach in the metastatic setting, is in a clinical trial setting. One of the clinical trials that is being developed as we speak is going to be a master protocol, where each treatment arm may be determined by the patient’s liquid biopsy results. The study is being led by many academic institutions.
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