Cancer Information Service

Definition of Cancer Information Service
National Cancer Institute

Cancer Information Service

(KAN-ser in-fer-MAY-shun SER-vis)
The National Cancer Institute’s Cancer Information Service (CIS) provides cancer-related information to the public, free of charge. CIS staff provide personalized responses to questions in easy-to-understand language. Help with quitting smoking is also available. Contact CIS by calling 1-800-4-CANCER (1-800-422-6237), or by using the LiveHelp instant-messaging service at https://livehelp.cancer.gov. Also called CIS.

Source: NCI Dictionary of Cancer Terms