Clonal expansion of the endometrium (IMAGE) Niigata University Caption A schematic illustration of the hypothesized clonal selection and diversification in normal endometrial epithelium. Clonal expansions occur through the rhizome structure which are network-like glandular structures that run horizontally along the muscle layer at the bottom of the endometrium. Each color indicates an expanding clone. Credit Niigata University Usage Restrictions The image may only be used with appropriate caption or credit. License Original 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.