The College of American Pathologists (CAP), the American Society of Clinical Oncology (ASCO), the Association for Molecular Pathology, and Fight Colorectal Cancer are collaborating to develop clinical guidelines for testing DNA mismatch repair (MMR) and microsatellite instability (MSI) status in patients with a range of cancers.
The groups have opened the public comment period for the guideline “MMR and MSI Testing in Patients Being Considered for Checkpoint Inhibitor Therapy.” Find details, including background information, recommended resources to review before providing comments, and overarching questions for consideration here.
All stakeholders—including pathologists who refer and perform molecular testing, oncologists, laboratory personnel, and allied health professionals—are encouraged to provide feedback on the draft recommendations to ensure the final recommendations are clinically practical. The comment period runs from February 19 to March 13, 2020.
Posted 2/24/2020

At the 2026 ASCO Annual Meeting, the Louisiana Oncology Society received the ASCO Jeffrey C Ward Affiliate Advocacy Award for advancing critical advocacy priorities that have translated into meaningful legislative victories. The Iowa Oncology Society and Washington State Medical Oncology Society were also recognized for their advocacy efforts in 2025 at the meeting, receiving second place awards.
