Long-term clinical outcomes of patients diagnosed with pT1a-muscularis mucosae with lymphovascular invasion or pT1b after endoscopic resection for cT1N0M0 esophageal squamous cell carcinoma

Tomohiro Kadota, Daiki Sato, Atsushi Inaba, Keiichiro Nishihara, Kenji Takashima, Keiichiro Nakajo, Hiroki Yukami, Saori Mishima, Kentaro Sawada, Daisuke Kotani, Hisashi Fujiwara, Masaki Nakamura, Hidehiro Hojo, Yusuke Yoda, Takashi Kojima, Takeo Fujita, Tomonori Yano