Patient selection
gastric GISTs, tumor
TUMOR
This retrospective study was approved by the ethics committee of Tongde Hospital of Zhejiang Province and the need for informed consent was waived (Approval No. 2021-040). Patients with gastric GISTs from two centers (Center 1: Tongde Hospital of Zhejiang Province, Center 2: Zhejiang Hospital) from January, 2012 to September, 2022 were enrolled in this research. The criteria for inclusion were as follows: (a) patients with complete CT images (including unenhanced, arterial and portal venous phase images) within 15 days before surgery; (b) solitary and primary lesions; (c) lesions without neoadjuvant treatment; (d) lesions larger than 1 cm and smaller than 5 cm in the long diameter. (e) patients with detailed clinical data (including age, gender, clinical symptoms and tumor markers). The inclusion and exclusion of patients are shown in Fig. 
Flowchart shows inclusion and exclusion criteria for this study