Fig. 2

a Resected specimens show Borrman type 3 tumor in the cardia (arrowheads). b–d Histological examination reveals an adenocarcinoma component and a yolk sac tumor (YST) component, with a reticular pattern (c) and Schiller–Duval bodies (d) are observed in YST component (hematoxylin and eosin staining)