Clinicopathological and endoscopic ultrasonography characteristics of esophageal bronchogenic cysts: A single-center study

Figure 1 Cystic content and histology. A: A highly proteinaceous and mucoid content during submucosal tunnel endoscopic resection; B: Histopathologic examination showing the ciliated columnar epithelium lining and smooth muscle layers in the cyst wall (hematoxylin and eosin, 5 ×); C: Histopathologic examination showing the ciliated columnar epithelium lining, smooth muscle layers and cartilage (hematoxylin and eosin, 5 ×); D: A typical pathological image showing that the lesion was originated from muscularis propria.

Figure 2 White light endoscopy and endoscopic ultrasonography images of esophageal bronchogenic cysts. A: An oblong flat bulging lesion in the lower esophagus; B: A light blue hemisphere lesion in the lower esophagus; C: A dumbbell bulging lesion in the lower esophagus; D: No lesions were found in the esophageal cavity; E: A lesion originating from the muscularis propria; F: A lesion originating from the submucosa; G: A lesion with a homogeneous hypoecho; H: No blood flow signal was detected within the lesion.

Figure 3 Special endoscopic ultrasonography findings. A: Punctiform hyperecho inside the lesion; B: Flocculent hypoecho inside the lesion; C: Posterior wall enhancement in the lesion; D: A separable zone was visible in the capsule cavity; E: Endoscopic ultrasonography elastography revealed a green pattern; F: Contrast-enhanced endoscopic ultrasonography revealed no enhancement in the capsule cavity but hypoenhancement in the separable zone and capsule wall.