Inclusion Criteria:  Patient is ≥ 18 years old Patient is capable of providing informed consent Patient is referred for ESD procedure of gastrointestinal neoplastic lesions  Exclusion Criteria:  Patient is < 18 years old Patient refused and/or unable to provide consent Patient is a pregnant woman Patients with lesions removed with other techniques besides ESD or a modified ESD technique (i.e., EMR or TEM) as defined in the Japan Gastroenterological Endoscopy Society (JGES) guidelines for endoscopic resection of lesions.