Kotaro Sasaki - Main (IMAGE) University of Pennsylvania Caption The microscopy image shows seminoma tissue in patient’s testis showing large, round cells with clear cytoplasm. The tumor tissue is heavily infiltrated by lymphocytes (small cells with dark/blue nuclei). Credit (Image: Courtesy of Kotaro Sasaki) Usage Restrictions Contact corresponding author and Cell Press for more information. 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.