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The American Association for Cancer Research (AACR) is the first and largest cancer research organization in the world, with a membership of more than 48,000 members residing in 127 countries and territories working on the front lines of the effort to eradicate ALL of the more than 200 disease we call cancer.

The American Association for Cancer Research (AACR) is the world's first and largest scientific organization solely dedicated to advancing lifesaving cancer research. The AACR brings together the greatest minds in cancer science to defeat the more than 200 types of cancer. Big or small, your donation to the AACR will help propel the next wave of discoveries to benefit cancer patients and their families everywhere.