1. Case 1 현 O 훈 (M/34)

11. Diagnosis : Stomach, distal gastrectomy: Signet ring cell carcinoma 1) Location: Angle 2) Tumor gross type: Early gastric carcinoma, type IIb 3) Histologic type by Lauren classification: Diffuse 4) Tumor size: 2.5 cm x 2.2 cm x 0.2 cm 5) Depth of invasion: Tumor invades submucosa (sm2) (pT1b) 6) Margins of resection: No tumor identified at proximal and distal resection margins (safety margin: proximal 0.9 cm, distal 3.5 cm) 7) Lymphatic invasion: Not identified 8) Vascular invasion: Not identified 9) Regional lymph nodes: No metastasis in 16 regional lymph nodes (0/16, pN0) (perigastric: 0/10, omental: 0/6)

12. Case 3 박 O 석 (F/84)

16. Diagnosis : Stomach, antrum to low body, endoscopic biopsy: Adenocarcinoma, poorly differentiated, with signet ring cell changes

17. Case 4 강 O 옥 (M/56)

19. Diagnosis : Stomach, mid body, greater curvature, endoscopic biopsy: Chronic active gastritis

20. Case 5 허 O 숙 (F/49)

22. Diagnosis : Colon, ascending, proximal, colonoscopic biopsy: Hyperplastic polyp