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[Gastric cancer 425]

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Á¶Á÷°Ë»ç¿¡¼­ M/D adenocarcinoma°¡ ³ª¿Í ESD¸¦ À§ÇÏ¿© ÀÇ·ÚµÈ ºÐÀÔ´Ï´Ù. ±×·±µ¥ ½Ã¼ú °á°ú 28¹Ð¸® ¹ÌºÐÈ­ È¥Àç¾ÏÀÌ°í ÀýÁ¦º¯¿¬ÀÌ 4 ¹æÇâ Áß 3 ¹æÇâ¿¡¼­ ¾ç¼ºÀ̾ú½À´Ï´Ù.


Early gastric carcinoma
1. Location : body, anterior wall
2. Gross type : EGC type IIb+IIc
3. Histologic type : tubular adenocarcinoma, moderately differentiated > signet ring cell carcinoma(30%)
4. Histologic type by Lauren : mixed
5. Size of carcinoma : (1) longest diameter, 28 mm (2) vertical diameter, 24 mm
6. Depth of invasion : invades mucosa (lamina propria) (pT1a)
7. Resection margin : proximal, distal and posterior resection margins involved by carcinoma, safety margin : anterior 10 mm
8. Lymphatic invasion : not identified(N)
9. Venous invasion : not identified(N)
10. Perineural invasion : not identified(N)
11. Microscopic ulcer : absent
12. Histologic heterogeneity: present

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¼ö¼úÀ» ÇÏ¿´°í residual tumor°¡ ÀÖ¾ú½À´Ï´Ù.

Stomach, subtotal gastrectomy:
Status post endoscopic submucosal dissection
Early gastric carcinoma, residual
1. Location : middle third, Center at body, anterior wall
2. Gross type : EGC type IIb
3. Histologic type : signet-ring cell carcinoma, residual
4. Histologic type by Lauren : diffuse
5. Size : 1.1x1 cm, residual
6. Depth of invasion : invades mucosa (lamina propria) (pT1a)
7. Resection margin: free from carcinoma, safety margin: proximal 2.1 cm, distal 9 cm
8. Lymph node metastasis : no metastasis in 34 regional lymph nodes (pN0)
9. Lymphatic invasion : not identified
10. Venous invasion : not identified
11. Perineural invasion : not identified

Á¶±âÀ§¾Ï ESD ÈÄ ÀýÁ¦º¯¿¬ ¾ç¼ºÀº 5.5% Á¤µµÀÔ´Ï´Ù. ÀÌ Áß ´Ù¹ß¼º ¾ç¼ºÀÎ °æ¿ì´Â ´ëºÎºÐ ¹º°¡ÀÇ ÀÌÀ¯°¡ ÀÖ½À´Ï´Ù. ÀúÈñÀÇ ºÐ¼®(Lee JH. Surg Endosc 2015)¿¡ ÀÇÇϸé histologic heterogeneity (EndoTODAY 20121122) ȤÀº EWDA (extremely well differentiated adenocarcinoma) (EndoTODAY 20121123)¿¡¼­ multiple lateral margin involvement°¡ ¸¹¾Ò½À´Ï´Ù. °ú°Å¿¡ Çѹø ¼Ò°³ÇÑ ¹Ù ÀÖÁö¸¸ ´Ù½Ã ¿Å±é´Ï´Ù.

In our institution, lateral margin involvement is evaluated and reported in 4 directions. In about 14 hundred early gastric cancers treated by ESD, lateral margin involvement was documented in 5.5%. Among them, 60% were single lateral margin positive. 40% were multiple lateral margin positive.

Histologic heterogeneity was seen in 25% and 46%, respectively. Extremely well differentiated adenocarcinoma was 7% and 25% in the two groups. This difference was statistically significant. Cases of technical difficulty was the same in the two groups. Surprisingly, the procedure time was shorter in the multiple lateral margin positive group. We thought that the technical aspect was not related to the number of positive lateral margin.

In this figure, yellow bar is the proportion of the cases with HH or EWDA. It showed that the ratio of HH or EWDA is increasing according to the number of lateral margin positive direction. And the difference was statistically significant.

°á±¹ histologic heterogeneity (EndoTODAY 20121122) ȤÀº EWDA (extremely well differentiated adenocarcinoma) (EndoTODAY 20121123)¿¡¼­ multiple lateral margin involvement°¡ ¸¹¾Ò´Ù´Â °ÍÀÔ´Ï´Ù. °¡º­¿î ¸¶À½À¸·Î ¾ÆÁÖ ½±°Ô ESD¸¦ ÇÑ ÈÄ multiple lateral marginÀÌ ³ª¿À´Â °ÍÀε¥ Àӻ󰡷μ­´Â »ó´çÈ÷ ´çȲ½º·¯¿î ÀÏÀÔ´Ï´Ù.

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* Âü°í: EndoTODAY ÀýÁ¦ º¯¿¬ ¾ç¼º

© ÀÏ¿ø³»½Ã°æ±³½Ç ¹Ù¸¥³»½Ã°æ¿¬±¸¼Ò ÀÌÁØÇà. EndoTODAY Endoscopy Learning Center. Lee Jun Haeng.