Fig. 5

Histopathologic evaluation showed a malignant neoplasm with goblet-like cells. Malignant cells with nests were found from the submucosa to the adventitia with lymphatic and venous invasion. Components of well-differentiated adenocarcinoma were also found in the mucosa (hematoxylin and eosin ×10, a small window shows a magnified image of goblet-like cell components ×400)