Explanation: The correct answer is D. The classification of testicular tumors is based on cell of origin. Germ cell tumors originate from the cell line maturing into sperm…

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1. 1 2.  James Ewing originally described it in 1921.  Ewing first described the tumour as an "endothelioma of bone" believing that it arose from the blood…

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1. Immunohistochemical staining was performed to further characterize 26 ENU-induced brain tumors (8 glioblastomas, 11 astrocytomas, and 7 oligodendrogliomas) from offspring…