Article Congenital malformation Foregut duplication cyst Recurrent laryngeal nerve monitoring Tracheal duplication cyst Vascular ring abnormal sensation adult case report chronic pain clinical article computer assisted tomography contrast medium diagnostic accuracy direct laryngoscopy dysphagia emergency ward esophagus cyst female flexible laryngoscopy health care planning hospital discharge human human tissue hyaline cartilage intraoperative monitoring left subclavian artery lung cyst lung sequestration medical history