“…On pathological examination, choriocarcinomas are biphasic tumors composed of cytotrophoblasts, characterized by medium-sized cells often with an eosinophilic cytoplasm, and syncytiotrophoblasts, characterized by condensed nuclei and an acidophilic cytoplasm [ [13] , [14] , [15] , [16] ]. However, when, as in our case, there are no cytotrophoblasts in the small biopsy tissue samples and only syncytiotrophoblasts are identified, adenocarcinoma is more likely to be suspected than choriocarcinoma [ 14 ].…”