Adam Bass, Dana-Farber Cancer Institute (IMAGE) Dana-Farber Cancer Institute Caption Researchers including Adam Bass, MD at Dana-Farber Cancer Institute, have identified four subtypes of tumors based on shared mutations and other molecular abnormalities. Credit Dana-Farber Cancer Institute Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.