Tendon Enthesis (IMAGE) Columbia University Irving Medical Center Caption If torn, the paper-thin tissue that connects tendon to bone (the enthesis) cannot heal itself, which limits the success of surgical repairs of torn shoulder and knee tendons. The Stavros Thomopoulos laboratory in Columbia's Department of Orthopedic Surgery is trying to harness stem cells to regenerate the tissue and improve surgical success rates. Credit Stavros Thomopoulos, Columbia University Irving Medical Center Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.