Endometriosis (IMAGE) Yale University Caption This is an example of the more aggressive endometriosis seen in women with the KRAS gene variant. Credit Dr. Hugh S. Taylor, Yale School of Medicine Usage Restrictions Credit required 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.