Fig. 3

Results of pathological examination. A Stage T1, poorly differentiated adenocarcinoma of gastric ulcer-type, with signet ring cell carcinoma differentiated in small foci and invading submucosa. B Stage T2, moderately poorly differentiated adenocarcinoma of ulcerated protrusion-type, with tumor size of 5 × 4 × 2 cm, invasion depth of deep muscle, total lymph node metastasis of 31, nerve invasion. C Stage T3, moderately poorly differentiated adenocarcinoma of ulcerated protrusion-type in gastric antrum, with tumor size of 3 × 2.5 cm, partial differentiation of hepatoid adenocarcinoma being considered, the invasion of tumor infiltration in subserosal connective tissue, and 24 lymph node metastases. D Stage T4, ulcerative poorly differentiated adenocarcinoma, some mucinous cell carcinoma, infiltrating the serosal membrane and invading the nerve