1. Cancer facts & figures 2012 [Internet]. Goyang, Korea: National Cancer Information Center;2013. [cited 2013 Feb 1]. Available from:. www.cancer.go.kr/fcatalog/ecatalog.jsp?Dir=88.
2. Ueno M, Muto T, Oya M, Ota H, Azekura K, Yamaguchi T. Multiple primary cancer: an experience at the Cancer Institute Hospital with special reference to colorectal cancer. Int J Clin Oncol. 2003; 8:162–167.
Article
3. Yamamoto S, Yoshimura K, Ri S, Fujita S, Akasu T, Moriya Y. The risk of multiple primary malignancies with colorectal carcinoma. Dis Colon Rectum. 2006; 49(10 Suppl):S30–S36.
Article
4. Ahmed F, Goodman MT, Kosary C, et al. Excess risk of subsequent primary cancers among colorectal carcinoma survivors, 1975–2001. Cancer. 2006; 107(5 Suppl):1162–1171.
Article
5. Chiang JM, Yeh CY, Changehien CR, et al. Clinical features of second other-site primary cancers among sporadic colorectal cancer patients–a hospital-based study of 3,722 cases. Hepatogastroenterology. 2004; 51:1341–1344.
6. Lim SB, Jeong SY, Choi HS, et al. Synchronous gastric cancer in primary sporadic colorectal cancer patients in Korea. Int J Colorectal Dis. 2008; 23:61–65.
Article
7. Kim HC, Kim CN, Jung CS, Yu CS, Kim JC. Multiple Primary malignant neoplasm with colorectal cancer. J Korean Cancer Assoc. 1998; 30:668–674.
8. Yoon SN, Oh ST, Lim SB, et al. Clinicopathologic characteristics of colorectal cancer patients with synchronous and metachronous gastric cancer. World J Surg. 2010; 34:2168–2176.
Article
9. Lee SH, Ahn BK, Baek SU. Multiple primary cancers in extracolonic sites with colorectal cancer. Int J Colorectal Dis. 2009; 24:301–304.
Article
10. Greene FL. American Joint Committee on Cancer; American Cancer Society. AJCC cancer staging manual. 6th ed.New York: Springer-Verlag;2002.
11. Park YJ, Shin KH, Park JG. Risk of gastric cancer in hereditary nonpolyposis colorectal cancer in Korea. Clin Cancer Res. 2000; 6:2994–2998.
12. Mecklin JP, Järvinen HJ. Tumor spectrum in cancer family syndrome (hereditary nonpolyposis colorectal cancer). Cancer. 1991; 68:1109–1112.
Article
13. Watson P, Lynch HT. Extracolonic cancer in hereditary non-polyposis colorectal cancer. Cancer. 1993; 71:677–685.
Article
14. Vasen HF, Wijnen JT, Menko FH, et al. Cancer risk in families with hereditary nonpolyposis colorectal cancer diagnosed by mutation analysis. Gastroenterology. 1996; 110:1020–1027.
Article
15. Evans HS, Møller H, Robinson D, Lewis CM, Bell CM, Hodgson SV. The risk of subsequent primary cancers after colorectal cancer in southeast England. Gut. 2002; 50:647–652.
Article
16. Yun HR, Yi LJ, Cho YK, et al. Double primary malignancy in colorectal cancer patients–MSI is the useful marker for predicting double primary tumors. Int J Colorectal Dis. 2009; 24:369–375.
Article
17. Lee WS, Lee JN, Choi S, Jung M, Baek JH, Lee WK. Multiple primary malignancies involving colorectal cancer–clinical characteristics and prognosis with reference to surveillance. Langenbecks Arch Surg. 2010; 395:359–364.
Article
18. Kim DY, Park YK, Joo JK, et al. Clinicopathological characteristics of signet ring cell carcinoma of the stomach. ANZ J Surg. 2004; 74:1060–1064.
Article
19. Kim JP, Kim SC, Yang HK. Prognostic significance of signet ring cell carcinoma of the stomach. Surg Oncol. 1994; 3:221–227.
Article
20. Hyung WJ, Noh SH, Lee JH, et al. Early gastric carcinoma with signet ring cell histology. Cancer. 2002; 94:78–83.
Article
21. Kong PS, Song KY, Lim KW, Kim SN, Park CH. Signet ring cell carcinoma in patient with gastric cancer, is it belong to the undifferentiated type? J Korean Surg Soc. 2006; 71:404–412.
22. Oh SY, Park DI, Yoo TW, et al. Is gastric cancer a new indication for surveillance colonoscopy? Colon cancer is increased in gastric cancer patients. Korean J Gastroenterol. 2006; 47:191–197.
23. Uchino S, Noguchi M, Ochiai A, Saito T, Kobayashi M, Hirohashi S. p53 mutation in gastric cancer: a genetic model for carcinogenesis is common to gastric and colorectal cancer. Int J Cancer. 1993; 54:759–764.
Article
24. Nakatsuru S, Yanagisawa A, Ichii S, et al. Somatic mutation of the APC gene in gastric cancer: frequent mutations in very well differentiated adenocarcinoma and signet-ring cell carcinoma. Hum Mol Genet. 1992; 1:559–563.
Article
25. Uchino S, Tsuda H, Noguchi M, et al. Frequent loss of hetero-zygosity at the DCC locus in gastric cancer. Cancer Res. 1992; 52:3099–3102.
26. Isogaki J, Shinmura K, Yin W, et al. Microsatellite instability and Kras mutations in gastric adenomas, with reference to associated gastric cancers. Cancer Detect Prev. 1999; 23:204–214.
Article
27. Chung DC, Rustgi AK. DNA mismatch repair and cancer. Gastroenterology. 1995; 109:1685–1699.
Article