Fig. 4
a Macroscopic findings of the resected specimen of the gastric lesion was a type 5 tumor based on the Borrmann classification, 73 × 55 mm, and was located in the gastrojejunal anastomosis (arrow). b Histological findings of gastric cancer showing invasion of cancer cells into the layer of tissue under the mucosa, and masses of cancer cells in the lymphatic vessels (× 25, hematoxylin and eosin (HE) stain, arrow). c Signet-ring cell carcinoma (SRCC) and poorly differentiated carcinoma were observed in the mucosa of the stomach (× 200, HE stain)