Which testicular tumor has the same histological features as dysgerminoma of the ovary?
A. teratoma
B. choriocarcinoma
C. seminoma
D. embryonal carcinoma
E. yolk sac tumor
C
Seminoma is the testicular equivalent of ovarian dysgerminoma. Both tumors are composed of a single cell population of polygonal cells that have a clear cytoplasm filled with glycogen and are considered to represent neoplastic germ cells similar to spermatogonia, early oocytes, or fetal gonocytes. Tumor cells are arranged in lobules surrounded by fibrous strands infiltrated with lymphocytes. The remaining tumors listed have the same names in the testis and the ovary.
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