Pheochromocytoma and Paraganglioma (IMAGE) University of Pennsylvania School of Medicine Caption These are the four sub-types of pheochromocytoma/paraganglioma. Credit Penn Medicine Usage Restrictions Credit: Penn Medicine 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.