Scientific Program

The Scientific Program will include the Plenary, Clinical Trials, Late-breaking Abstract sessions, as well as the popular Science Highlights and Cancer Breakthroughs session.

The Call for Abstracts for AM 2026 is now closed. Notifications of acceptance (including late-breaking shell submissions) will be sent to the presenting author only on May 14, 2026.

NEW for 2026!

The Late-breaking Abstract (LBA) submission process is changing to ensure we are highlighting the very top science at every stage of planning. Late-breaking abstract shell submissions — placeholders for which no data are required — were due on the regular submission deadline of February 24, 2026. 

Notifications of acceptance (including late-breaking shell submissions) will be sent to the presenting author only on May 14, 2026.

If accepted, data for LBAs will be due on July 10, 2026. No results or conclusions are required for shell abstracts. 

Please review the abstract guidelines and mark your calendar for the key abstract deadlines below:
 

2026 Important Dates
Abstract Submission Site Opens (including Late-breaking Placeholder (shell))
December 4, 2025
Abstract Submission Site Closes
February 24, 2026, at 11:59 p.m. Pacific time
Late-breaking Placeholder (shell) Abstract Submission Deadline
February 24, 2026, at 11:59 p.m. Pacific time
Abstract Notification Sent to Presenting Author
May 14, 2026
Abstract Withdrawal Deadline
 June 28, 2026
Late-breaking Final Data Submission Deadline
July 10, 2026, at 11:59 p.m. Pacific time
Abstract Titles, including LBAs; Released on the Annual Meeting Portal
May 14, 2026
Regular Abstracts Released in the Red Journal Annual Meeting Proceedings
September 25, 2026, at 5:00 p.m. Eastern time

American Society for Radiation Oncology
251 18th Street South, 8th Floor
Arlington, VA 22202
Telephone: 703-502-1550
www.astro.org

TERMS OF USE & PRIVACY POLICY

Connect With Us: