Version 9 of the American Joint Committee on Cancer (AJCC) Cancer Staging System for Lung. The new Version 9 Lung content is presented in a streamlined, easy-to-use format, incorporates the World Health Organization (WHO) Classification of Tumors histology codes. Physicians, registrars, researchers, and other content users will be benefit from the updated content, including tables, explanatory notes and illustrations. Version 9 of the Lung Cancer Staging System becomes effective on January 1, 2025 and replaces the 8th Edition Lung cancer site content.

AJCC Moved from Editions to Versions

The American Joint Committee on Cancer (AJCC) made an important change to how it updates and releases Cancer Staging content. The AJCC shifted from a Cancer Staging Manual to a Cancer Staging System and moved away from Editions to Versions. Updated Version 9 disease sites go into effect on January 1, 2025 following their release.