Lung cancer metastasis-induced distal esophageal segmental spasm confirmed by individualized peroral endoscopic myotomy: A case report

Figure 2 Diagnosis and treatment of the patient. A: Esophagogram revealed grade I dilation of the esophageal lumen, segmental stenosis of the distal esophagus, and delayed emptying of barium contrast agent from the esophagus; B: Endoscopy revealed a 2-cm long segment of concentric esophageal stenosis with apparently normal overlying mucosa; C: The cardia had normal contraction and relaxation; D: Computed tomography revealed a right upper lung mass; E: Unclear hierarchy of the esophageal wall at the narrow segment; F: Myotomy at the narrow segment; G: The length of the entire myotomy was approximately 6 cm; H: Esophageal muscle biopsy result; I: Repeated esophagography on postoperative day 54.