National Cancer Institute Data Access SystemThe Cancer Data Access System ("CDAS") is a website where you may request data recorded from various research studies. For some studies, you may also request images or biospecimens.
CDAS provides extensive public documentation for each study, including a trial summary, an overview of the data collected, and a searchable database of research projects and publications.
If you are interested in obtaining study data, you may begin a CDAS project for that study. All projects are reviewed by NCI trial leadership. Upon approval, you will be granted access to the requested data and/or materials for a limited period.