Background and Study Aims:Neoplastic lesions in the digestive-tract mucosa are termed “superficial” when the depth of invasion is limited to the mucosa and submucosa.The endoscopic appearance has a predictive value for invasion into the submucosa,which is critical for the risk of nodal metastases. Background and Study Aims: Neoplastic lesions in the digestive-tract mucosa are termed “superficial” when the depth of invasion is limited to the mucosa and submucosa. Endoscopic appearance has a predictive value for invasion into the submucosa, which is critical for the risk of nodal metastases.