- Through this event we hope to raise awareness of the nearly 7,000 Americans currently living with a brain tumor diagnosis, and the 13,000 people who will lose their battle with a brain tumor this year. Events like this allow the ABTA to fund desperately needed research, patient programs and support services. With an expected attendance of over 1,500 people, it will be a day of celebration and remembrance for all those affected by a brain tumor diagnosis.