Fig. 4From: Surgically resected primary esophageal choriocarcinoma accompanied with Barrett’s adenocarcinoma: a case reportMicroscopic findings of the choriocarcinoma (low magnification). The elevated tumor comprised a hemorrhagic portion and a medullary portion with small tumor cells (a). Most of the elevated tumor was positive for hCG using immunohistochemical staining (b)Back to article page