Dr. Jayaprakash Sreenarasimhaiah (image) UT Southwestern Medical Center Caption Dr. Jayaprakash Sreenarasimhaiah, and other gastroenterologists at UT Southwestern are using a novel procedure to freeze damaged cells in the esophagus, preventing them from turning cancerous. Credit UT Southwestern Medical Center Usage Restrictions Please use our credit line. 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.