Importantly, this amplified initial distortion (= secondary distortion) is in the opposite direction to that seen in the pre-carcinogenic stomach wall at adenocarcinoma. In the case of adenocarcinoma, the stomach with initial distortion decreases the momentum, so that it amplifies the distortion by decreasing the momentum. Against of this, in the case of signet ring cell adenocarcinoma, the stomach with the same initial distortion increases the momentum, so that it amplifies the distortion by increasing the momentum. Because of this difference in amplification mechanism, the stomach wall at signet ring cell adenocarcinoma causes secondary distortion that is opposite in direction to the secondary distortion at adenocarcinoma. Specifically, in the case of signet ring cell adenocarcinoma, the secondary distortion is in the direction from the mucosal epithelium to the lamina propria mucosae.