1)Kodama M, Kakegawa T. Treatment of superficial cancer of the esophagus:a summary of responses to a questionnaire on superficial cancer of the esophagus in Japan. Surgery 123:432-439, 1998
2)Shimada H, Nabeya Y, Matsubara H, et al. Prediction of lymph node status in patients with superficial esophageal carcinoma:analysis of 160 surgically resected cancers. Am J Surg 191:250-254, 2006
3)Eguchi T, Nakanishi Y, Shimoda T, et al. Histopathological criteria for additional treatment after endoscopic mucosal resection for esophageal cancer:analysis of 464 surgically resected cases. Mod Pathol 19:475-480, 2006
4)Kim DU, Lee JH, Min BH, et al. Risk factors of lymph node metastasis in T1 esophageal squamous cell carcinoma. J Gastroenterol Hepatol 23:619-625, 2008
5)Tomita N, Matsumoto T, Hayashi T, et al. Lymphatic invasion according to D2-40 immunostaining is a strong predictor of nodal metastasis in superficial squamous cell carcinoma of the esophagus:algorithm for risk of nodal metastasis based on lymphatic invasion. Pathol Int 58:282-287, 2008
6)Tajima Y, Nakanishi Y, Ochiai A, et al. Histopathologic findings predicting lymph node metastasis and prognosis of patients with superficial esophageal carcinoma:analysis of 240 surgically resected tumors. Cancer 88:1285-1293, 2000
7)Akutsu Y, Uesato M, Shuto K, et al. The overall prevalence of metastasis in T1 esophageal squamous cell carcinoma:A retrospective analysis of 295 patients. Ann Surg 257:1032-1038, 2013
8)Motoori M, Yano M, Ishihara R, et al. Comparison between radical esophagectomy and definitive chemoradiotherapy in patients with clinical T1bN0M0 esophageal cancer. Ann Surg Oncol 19:2135-2141, 2012
9)Kato H, Sato A, Fukuda H, et al. A phase II trial of chemoradiotherapy for stage I esophageal squamous cell carcinoma:Japan Clinical Oncology Group Study(JCOG9708). Jpn J Clin Oncol 39:638-643, 2009
10)Kato K, Igaki H, Ito Y, et al. Parallel-group controlled trial of esophagectomy versus chemoradiotherapy in patients with clinical stage I esophageal carcinoma(JCOG0502). J Clin Oncol 37(suppl 4):abstr 7, 2019
11)日本食道学会(編).食道癌診療ガイドライン2017年版,金原出版,2017
12)Akutsu Y, Kato K, Igaki H, et al. The prevalence of overall and initial lymph node metastases in clinical T1N0 thoracic esophageal cancer:from the results of JCOG0502, a prospective multicenter study. Ann Surg 264:1009-1015, 2016
13)Shimizu Y, Kato M, Yamamoto J, et al. EMR combined with chemoradiotherapy:a novel treatment for superficial esophageal squamous-cell carcinoma. Gastrointest Endosc 59:199-204, 2004
14)Kawaguchi G, Sasamoto R, Abe E, et al. The effectiveness of endoscopic submucosal dissection followed by chemoradiotherapy for superficial esophageal cancer. Radiat Oncol 10:31, 2015
15)Yoshimizu S, Yoshio T, Ishiyama A, et al. Long-term outcomes of combined endoscopic resection and chemoradiotherapy for esophageal squamous cell carcinoma with submucosal invasion. Dig Liver Dis 50:833-838, 2018
16)Minashi K, Nihei K, Mizusawa J, et al. Efficacy of endoscopic resection and selective chemoradiotherapy for stage I esophageal squamous cell carcinoma. Gastroenterology 157:382-390, 2019
17)Minashi K, Nihei K, Ogawa G, et al. Final analysis of single-arm confirmatory study of diagnostic endoscopic resection(ER)plus selective chemoradiotherapy(CRT)for stage I esophageal squamous cell carcinoma(ESCC):JCOG0508. J Clin Oncol 36(suppl 15):abstr 4023, 2018
18)Oyama T, Momma K. A new classification of magnified endoscopy for superficial esophageal squamous cell carcinoma. Esophagus 8:247-251, 2011