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Gastrointestinal submucosal tumors low grade: Doubling time is 17.2 mo. A: EUS finding at baseline, tumor diameter is 22.0 mm; B: EUS finding at four years later, tumor diameter is 34.0 mm; C: Endoscopic finding at baseline; D: Endoscopic finding at four years later. There is almost no change in endoscopic findings in four years. EUS: Endoscopic ultrasound.
