2020-2 / JANUARY 13 (CONTRIBUTOR: JONATHAN EPSTEIN)
A 31 year-old male was treated with chemotherapy for clinical retroperitoneal metastases a malignant germ cell tumor composed of 90% embryonal carcinoma, 9% yolk sac tumor (YST), and 1% teratoma. Post chemotherapy there was residual retroperitoneal tumor. A retroperitoneal lymph node dissection was performed.
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1. What is the correct diagnosis?
a. Metastatic embryonal carcinoma
b. Metastatic mature teratoma
c. Somatic malignant arising in a teratoma
d. Metastatic glandular and sarcomatoid yolk sac tumor