The ultrastructure of "pinealoma". (Seminoma-like tumor of the pineal region).

摘要: The ultrastructure of a “seminoma-like tumor” the pineal region (atypical teratoma pineal) was described. tumor composed large clear polygonal cells and small lymphocyte-like cells. origin not clearly established. Although some ultrastructural similarities were found between parenchymal cells, germinal seminoma even more striking. Most identical to lymphocytes; leukocytes phagocytes. It thought that lymphocytic infiltration could represent an immunological response host against possible antigen(s). Intact phagocytes within cytoplasm This possibly immunologically mediated destruction by activated Whether or arose in gonadal elements (germinal cells) be