PMC6526543_01
Left: HE stained section of choriocarcinoma metastasis in L2. Right: the same section stained immunohistochemically for p63. Positive reaction (brown) in the nuclei of the cytotrophoblast cells.
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fig1
The extensive microscopic examination of the mediastinal tumour revealed widespread necrosis and peripheral areas with two distinct tumour cell populations (syncytio- and cytotrophoblasts) (Figure 1).