Histological examination of the left-sided testicular mass. Two distinct masses are identified. (a) The classic seminoma with clear cell morphology (depicted by the blue arrows) is on the top and the circumscribed Leydig cell tumor is at the bottom (black arrows) (hematoxylin and eosin (H&E), ×250). On higher magnification, (b) the seminoma cells contain abundant clear cytoplasm and slightly hyperchromatic nuclei (H&E, ×4000). (c) The Leydig cell tumor is composed of polygonal cells with prominent nucleoli with eosinophilic, granular, and vacuolated cytoplasm (H&E, ×4000).