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[Gastric cancer 472]

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Stomach, endoscopic submucosal dissection:
Early gastric carcinoma
1. Location : antrum, anterior wall
2. Gross type : EGC type I
3. Histologic type : tubular adenocarcinoma, moderately differentiated >> tubular adenocarcinoma, poorly differentiated (about 5%)
4. Histologic type by Lauren : intestinal
5. Size of carcinoma : (1) longest diameter, 32 mm (2) vertical diameter, 15 mm
6. Depth of invasion : invades submucosa, (depth of sm invasion : 500 §­) (pT1b)
7. Resection margin : free from carcinoma(N), safety margin : distal 12 mm, proximal 12 mm, anterior 12 mm, posterior 12 mm, deep 300 §­ (sm only)
8. Lymphatic invasion : present (++)
9. Venous invasion : not identified(N)
10. Perineural invasion : not identified(N)
11. Microscopic ulcer : absent
12. Histologic heterogeneity: present

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