Siah2 (IMAGE) Sanford Burnham Prebys Caption Siah2 levels (brown staining) are high in human castration-resistant prostate cancer (left), as compared to benign prostate growths (right). Credit Sanford-Burnham Medical Research Institute Usage Restrictions Free to use in conjunction with this story only, using provided caption and 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.