A CT-based nomogram established for differentiating gastrointestinal heterotopic pancreas from gastrointestinal stromal tumor: compared with a machine-learning model.

"Declarations Ethics approval and consent to participateThe requirement for informed consent was waived by the Ethics Committee of the Second Affiliated Hospital of Zhejiang University School of Medicine because of the retrospective nature of the study. Patients were not required to give informed consent to the study because the analysis used anonymous clinical data that were obtained after each patient agreed to treatment by written consent. The study is approved by the institutional review board of the Second Affiliated Hospital of Zhejiang University School of Medicine. All experiments were performed in accordance with relevant guidelines and regulations. Consent for publicationNot applicable. Competing interestsAll authors declare that they have no competing interest. Competing interests All authors declare that they have no competing interest."

"Funding Not applicable."