Primary gastric choriocarcinoma - a rare and aggressive tumor with multilineage differentiation: A case report

Figure 2 Histological examination results. A: The mixed gastric carcinoma shows two components: choriocarcinoma (marked by *) and adenocarcinoma (marked by ▼); B-F: The choriocarcinoma cells are negative for CEA (B) and CDX2 (C, D) and show positivity for Cytokeratin 7 (E) and HCG (F); G, H: The syncytiotrophoblast-like cells are marked by inhibin (G) and CD138 (H). The adenocarcinoma component is positive for CEA (B) and CDX2 (C, D) and to not present positivity for Cytokeratin 7 (E) and HCG (F); I, J: The normal gastric mucosa cells are marked by CD138 (I) and Hepar A (J).