A slidable submucosal mass in the fundus of the stomach may be a smooth muscle tumor, gastric mesenchymal tumor, lipoma, or venous tumor.
The reason why the submucosal mass of the gastric fundus can slide is because the mass may be located in the muscular or submucosal layer of the mucosa, which is not tightly adherent to the intrinsic muscular layer of the stomach, and has not grown outward into the lumen of the stomach, and therefore can be moved when touched with a biopsy forceps during gastroscopy.
These masses have a higher probability of being benign lesions, such as early gastric mesenchymal tumors, gastric smooth muscle tumors, lipomas, and venous tumors. For malignant gastric lesions, they often appear unpromotable because most of them have infiltrated the muscularis propria.
Although there is a higher probability that the submucosal sliding mass in the fundus of the stomach is a benign lesion, the mass may grow and infiltrate further before the nature of the lesion is clarified, and if such a lesion is detected, it should be examined by ultrasound endoscopy in a timely manner in order to avoid a delay in the condition.