Endometriosis (IMAGE) Johns Hopkins Medicine Caption Endometriosis in the peritoneal tissue (left) forming a scar. Under microscopy, it is composed of glands and surrounding stroma with chronic inflammation and fibrosis. Credit le-Ming Shih 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.