Postoperative encapsulated hemoperitoneum in a patient with gastric stromal tumor treated by exposed endoscopic full-thickness resection: A case report

Figure 1 Preoperative endoscopic examination results. A: Endoscopic image showing a hemispherical protrusion, approximately 16 mm in diameter, located at the upper gastric curvature adjacent to the stomach fundus, with a smooth surface mucosa and poor mobility; B: Endoscopic ultrasound image showing a mass 19.3 mm × 16.1 mm in size, derived from the muscularis propria, which partly grew outside the cavity. The echo pattern of the mass was uniform and at a low level.