Coexistence of early gastric cancer and benign submucosal lesions mimic invasive cancer: a retrospective multicenter experience.

"Declarations Ethics approval and consent to participateThe authors declare that all procedures performed in studies were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments. This study was approved by the Ethics Committee of Qilu Hospital, Shandong University (NO.2022-029). Written informed consent was waived by Ethical committee of Qilu Hospital, Shandong University (NO.2022-029). Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding The study was supported by Nature Science Foundation of Shandong Province, China (ZR2020LZL003) and the Taishan Scholars Program of Shandong Province."