How is embryonal carcinoma?

➢ Second most common ➢ Ill-defined, invasive ➢ Foci of hemorrhage and necrosis ➢ Small, even in patients with systemic metastases ➢ In most cases admixed with other germ cell tumors (e.g., yolk sac tumor, teratoma, choriocarcinoma) ➢ Pure embryonal carcinomas account for only 2% to 3% of all testicular germ cell tumors ➢ Large cells with large hyperchromatic nuclei ➢ Basophilic cytoplasm, indistinct cell borders, large nuclei, and prominent nucleoli ➢ Undifferentiated, solid sheets or may form primitive glandular structures and irregular papillae