MasSpec Pen (IMAGE) University of Texas at Austin Caption Dr. James Suliburk, head of endocrine surgery at Baylor College of Medicine, using the MasSpec Pen during a surgery. Credit James Suliburk/Baylor College of Medicine Usage Restrictions Only with appropriate credit 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.