PMC7658567_01
A) Microscopic examination (100X) of Hematoxilin and Eosin stained slides show neoplastic tissue composed of B) choriocarcinoma component with biphasic proliferation of atypical cytotrophoblasts and syncytiotrophoblasts (arrow head) (400X) adjacent to C) adenocarcinoma component showing infiltration of irregular glandular structures with overlying atypical epithelial cells (400X).
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Microscopic examination of the colon revealed an infiltrative tumor composed of choriocarcinoma component with biphasic proliferation of atypical cytotrophoblasts and syncytiotrophoblasts adjacent to adenocarcinoma components (Fig. 1).