Bronchogenic cysts treated with submucosal tunneling endoscopic resection and natural orifice transluminal endoscopy: Two case reports and review of literature

Figure 1 Preoperative imaging and endoscopic findings. A: Computed tomography shows a well-circumscribed, low-density mass at the gastroesophageal junction (case 1) (arrow indicate the lesions); B: Endoscopy reveals a smooth submucosal bulge 35 cm from the incisors (case 1) (arrow indicate the lesions); C: Endoscopic ultrasonography demonstrates a hypoechoic, irregularly shaped lesion arising from the muscularis propria with clear margins (case 1); D: Contrast-enhanced computed tomography shows a mass adjacent to the gastroesophageal junction with mild enhancement and luminal narrowing (case 2) (arrow indicate the lesions); E: Endoscopy revealing a smooth, intact submucosal bulge 38 cm from the incisors (case 2) (arrow indicate the lesions); F: Endoscopic ultrasonography showing a hypoechoic lesion originating from the muscularis propria, with no vascular signal on color Doppler flow imaging and intermediate stiffness on elastography (case 2).