Diagnosis: Embryonal carcinoma + yolk sac tumor + syncytiotrophoblastic cells      

            Comments: The embryonal carcinoma component shows a tubular arrangement (Figs. 1 and 2) and the yolk sac is predominantly solid (Figs. 3, 4, and 5). Scattered syncytiotrophoblastic cells were present only in the yolk sac component. In some areas, the cells of the yolk sac tumor show intracellular vacuoles producing a honey comb or reticular appearance. Compare the distinct patterns of the nuclei. In the embryonal carcinoma the nuclei are large and vesicular, the nucleoli are prominent and the chromatin irregularly distributed frequently radiating from the nucleoli toward the nuclear membrane.