case_images: PMC11789860_01
case_images: (A and B) represented gastroscopic images, (A) showed a submucosal bulge in the distal part of gastric corpus of the greater curvature. The lesion was originated in the lamina musculi propria, showing heterogeneous hypoecho, with a size of 16 mm x 15 mm. The mucosa folds on the surface were immobilized and touched relatively hard. (B) showed another submucosal bulge in the posterior wall of gastric antrum of the greater curvature. The lesion was originated in the submucosa, showing homogeneity no echo with high echo envelope, with a size of 22 mm x 21 mm. The surface was smooth and touched soft. (C) represented ultrasonic gastroscopy image of the lesion in gastric antrum.
case_images: medi-104-e41338-g001.jpg
case_images: PMC11789860_01_medi-104-e41338-g001.jpg
case_images: F1
case_images: After admission, the patient underwent gastroscopy and endoscopic ultrasonography, as was shown in Figure 1.
case_images: (A-E) represented axial CT plain scan, arterial phase, venous phase and delayed phase of enhancement scan, coronal arterial enhancement, respectively, showing the cystic lesion of gastric antrum with a larger axial cross-sectional area of 49 mm x 35 mm. The lesion was in the shape of ovate, with well-defined margin. The diameter of the thickest part of the cyst wall was about 9 mm, the CT values of plain and enhancement phase III were about 41HU, 45HU, 61HU and 70HU, respectively. The cyst contents showed low density and no enhancement, the CT values of plain and enhancement phase III were about 5HU, 6HU, 8HU, 9HU.
case_images: medi-104-e41338-g002.jpg
case_images: PMC11789860_01_medi-104-e41338-g002.jpg
case_images: F2
case_images: Subsequently, CT and MRI were performed for detailed examination of the lesions, as shown in Figures 2-5.
case_images: (A-E) represented T1WI, T2WI, axial early and delayed enhancement, coronal delayed enhancement, showing the same lesion as Figure 2. of gastric antrum. The cyst wall showed isointense on T1WI and T2WI, with prolonged enhancement, no wash-out until the delayed phase. The cyst contents showed hypointense on T1WI and hyperintense on T2WI, with no enhancement.
case_images: medi-104-e41338-g003.jpg
case_images: PMC11789860_01_medi-104-e41338-g003.jpg
case_images: F3
case_images: Subsequently, CT and MRI were performed for detailed examination of the lesions, as shown in Figures 2-5.
case_images: (A-D) represented axial CT plain scan, arterial phase, venous phase and delayed phase of enhancement scan, (E and F) represented oblique sagittal and coronal arterial enhancement, respectively, showing another cystic lesion protruding from gastric corpus of greater curvature, with a larger axial cross-sectional area of 36 mm x 17 mm. Punctate calcifications were found in the cyst wall. The CT features of cyst wall and cyst content were similar to the lesion of gastric antrum.
case_images: medi-104-e41338-g004.jpg
case_images: PMC11789860_01_medi-104-e41338-g004.jpg
case_images: F4
case_images: Subsequently, CT and MRI were performed for detailed examination of the lesions, as shown in Figures 2-5.
case_images: (A-D) represented T1WI, T2WI, axial early and delayed enhancement, (E-F) represented oblique sagittal and coronal delayed enhancement, respectively, showing the same lesion as Figure 4 of gastric corpus. The cyst wall showed isointense on T1WI and T2WI, with prolonged enhancement, the cyst contents showed hypointense on T1WI and hyperintense on T2WI, with no enhancement, similar to the lesion of gastric antrum.
case_images: medi-104-e41338-g005.jpg
case_images: PMC11789860_01_medi-104-e41338-g005.jpg
case_images: F5
case_images: Subsequently, CT and MRI were performed for detailed examination of the lesions, as shown in Figures 2-5.
case_images: (A-C) represented pathological pictures under microscope of 40 times, 100 times and 200 times. Microscopic examination revealed a benign bronchogenic cyst, lined with pseudolayered columnar epithelium and single columnar/flat epithelium, no atypia was observed in the epithelium, and fibrous tissue and smooth muscle were found around the epithelium. (hematoxylin-eosin stain, x40, x100, x20).
case_images: medi-104-e41338-g006.jpg
case_images: PMC11789860_01_medi-104-e41338-g006.jpg
case_images: F6
case_images: Microscopic pathology showed that the lesions were lined with pseudolayered columnar epithelium and a single columnar/flat epithelium; no atypia was observed in the epithelium, and fibrous tissue and smooth muscle were found around the epithelium, as shown in Figure 6.