Feasibility of endoscopic resection in superficial esophageal squamous carcinoma

Endoscopic resection should be performed for mucosal cancer of 3 cm or less without positive lymph nodes. Moreover, if pathological examination of the endoscopically resected specimens shows invasion of the sm1 layer and a lower LMM invasion width of 3.0 mm or less, indicating an absence of LVI, the patient can be carefully observed without additional treatment.