1. Chuang SC, Scelo G, Tonita JM, et al. Risk of second primary cancer among patients with head and neck cancers: a pooled analysis of 13 cancer registries. Int J Cancer. 2008; 123:2390–2396.
Article
2. Guardiola E, Pivot X, Dassonville O, et al. Is routine triple endoscopy for head and neck carcinoma patients necessary in light of a negative chest computed tomography scan? Cancer. 2004; 101:2028–2033.
Article
3. Jones AS, Morar P, Phillips DE, Field JK, Husband D, Helliwell TR. Second primary tumors in patients with head and neck squamous cell carcinoma. Cancer. 1995; 75:1343–1353.
Article
4. Davidson J, Gilbert R, Irish J, et al. The role of panendoscopy in the management of mucosal head and neck malignancy-a prospective evaluation. Head Neck. 2000; 22:449–454. discussion 454–455.
Article
5. McGarry GW, Mackenzie K, Finlay I. Colonic second primary cancers in patients with index tumours of the head and neck. Br J Surg. 1994; 81:1481.
Article
6. Sikora AG, Morris LG, Sturgis EM. Bidirectional association of anogenital and oral cavity/pharyngeal carcinomas in men. Arch Otolaryngol Head Neck Surg. 2009; 135:402–405.
Article
7. Yamamoto E, Shibuya H, Yoshimura R, Miura M. Site specific de-pendency of second primary cancer in early stage head and neck squamous cell carcinoma. Cancer. 2002; 94:2007–2014.
Article
8. Sturgis EM, Miller RH. Second primary malignancies in the head and neck cancer patient. Ann Otol Rhinol Laryngol. 1995; 104:946–954.
Article
9. Jung KW, Won YJ, Kong HJ, Oh CM, Lee DH, Lee JS. Cancer statistics in Korea: incidence, mortality, survival, and prevalence in 2011. Cancer Res Treat. 2014; 46:109–123.
Article
10. Pisani P, Bray F, Parkin DM. Estimates of the worldwide prevalence of cancer for 25 sites in the adult population. Int J Cancer. 2002; 97:72–81.
Article
11. Ramos M, Benavente S, Giralt J. Management of squamous cell carcinoma of the head and neck: updated European treatment recommendations. Expert Rev Anticancer Ther. 2010; 10:339–344.
Article
12. Shiozaki H, Tahara H, Kobayashi K, et al. Endoscopic screening of early esophageal cancer with the Lugol dye method in patients with head and neck cancers. Cancer. 1990; 66:2068–2071.
Article
13. Makuuchi H, Tanaka H, Shimada H, et al. Esophageal cancer and multiple primary cancer. Gan To Kagaku Ryoho. 1997; 24:1–7.
14. Benninger MS, Shariff A, Blazoff K. Symptom-directed selective endoscopy: long-term efficacy. Arch Otolaryngol Head Neck Surg. 2001; 127:770–773.
15. Lo OS, Law S, Wei WI, et al. Esophageal cancers with synchronous or antecedent head and neck cancers: a more formidable challenge? Ann Surg Oncol. 2008; 15:1750–1756.
Article
16. Slaughter DP, Southwick HW, Smejkal W. Field cancerization in oral stratified squamous epithelium; clinical implications of multicentric origin. Cancer. 1953; 6:963–968.
Article
17. Lee BI, Hong SP, Kim SE, et al. Korean guidelines for colorectal cancer screening and polyp detection. Clin Endosc. 2012; 45:25–43.
Article
18. Winawer SJ, Zauber AG, Ho MN, et al. Prevention of colorectal cancer by colonoscopic polypectomy. The National Polyp Study Workgroup. N Engl J Med. 1993; 329:1977–1981.
19. Rabeneck L, Paszat LF, Saskin R, Stukel TA. Association between colonoscopy rates and colorectal cancer mortality. Am J Gastroenterol. 2010; 105:1627–1632.
Article
20. Chow TL, Lee DT, Choi CY, Chan TT, Lam SH. Prediction of simultaneous esophageal lesions in head and neck squamous cell carcinoma: a multivariate analysis. Arch Otolaryngol Head Neck Surg. 2009; 135:882–885.
21. Watanabe A, Hosokawa M, Taniguchi M, Tsujie H, Sasaki S. Head and neck cancer associated with esophageal cancer. Auris Nasus Larynx. 2007; 34:207–211.
Article
22. León X, Ferlito A, Myer CM 3rd, et al. Second primary tumors in head and neck cancer patients. Acta Otolaryngol. 2002; 122:765–778.
Article
23. Grossman TW. The incidence and diagnosis of secondary esophageal carcinoma in the head and neck cancer patient. Laryngoscope. 1989; 99:1052–1056.
Article
24. Lim H, Kim do H, Jung HY, et al. Clinical significance of early detection of esophageal cancer in patients with head and neck cancer. Gut Liver. 2015; 9:159–165.
Article
25. Miyazaki T, Tanaka N, Sano A, et al. Clinical significance of total colonoscopy for screening of colon lesions in patients with esophageal cancer. Anticancer Res. 2013; 33:5113–5117.