About Us

Cooperative Groups

Cancer Cooperative Groups design and conduct clinical trials exploring new cancer treatments, methods of cancer prevention and early detection, and quality-of-life and rehabilitation issues. The National Cancer Institute-sponsored Clinical Trials Cooperative Group Program, created in 1955, includes several research networks, called cooperative groups, that conduct cancer clinical research primarily under the sponsorship of the NCI. Cooperative groups have a strong track record of designing and completing trials that have diminished the impact of cancer in many ways.

The list below includes all cancer cooperative groups in the NCI-sponsored program. Several of the cooperative groups are in the midst of mergers and consolidations. The News and Information section contains more information about the changes ongoing in the cooperative groups which serve adults with cancer or at risk of developing the disease. In the list below, merging groups are presented together under their proposed or chosen new names. Please visit individual websites to learn more about the accomplishments and ongoing clinical research of each of the cooperative groups.



Alliance for Clinical Trials in Oncology

American College of Surgeons Oncology Group

Cancer and Leukemia Group B

North Central Cancer Treatment Group


Children's Oncology Group


ECOG-ACRIN Cancer Research Group

American College of Radiology Imaging Network

Eastern Cooperative Oncology Group


NCIC Clinical Trials Group (Canadian Cancer Society)


NRG Oncology Group

National Surgical Adjuvant Breast & Bowel Project

Radiation Therapy Oncology Group

Gynecologic Oncology Group