PMC10425808_01
Endoscopy.
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Barium meal examination revealed a locally depressed fundus of the stomach with a smooth mucosal surface ( Supplementary Figure S1 ), while endoscopy showed a large submucosal bulge with a smooth surface at the fundus of the stomach ( Figure 1 ), suspected to be gastric submucosal tumor.
Magnetic resonance imaging (MRI). (A, E) T1-weighted image (T1WI); (B, F) T2-weighted image (T2WI); (C) Enhanced arterial phase; (D) Enhanced portal phase.
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MRI detected a 6.4 x 7 cm mass in the left upper abdomen with low signal on T1-weighted images and high signal on T2-weighted images, with partial intensification in the arterial phase and progressive intensification in the venous phase ( Figure 2 ). The patient timeline of diagnostic testing and Therapeutic intervention are shown in  Supplementary Figure S2 .
Intraoperative photograph.
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The mass exhibited dimensions of 9 * 8 cm and had a soft consistency with angulated surface vessels closely associated with the lesser curvature of the stomach ( Figure 3 ).
Post-operative histopathological slides of the mass with hematoxylin and eosin staining.
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The final pathology report indicated a hemangioma ( Figure 4 ).