[Esophageal Achalasia after Surgery for Lung Cancer].

A 61-year-old man was admitted to our hospital for an abnormal chest shadow. Computed tomography (CT) showed a pulmonary nodular shadow in the right middle lobe. He was diagnosed with stage cT2aN0M0 (IB) pulmonary adenocarcinoma and was treated with surgery of right middle lobectomy and mediastinal lymph node dissection. On 2nd day after surgery, he got aspiration pneumonia. CT showed consolidation of left lower lobe, stenosis of lower esophagus with dilation of the oral side and stagnation of residual foods. Esophagogram showed stenosis of the lower esophagus and stagnation of the contrast medium. He was diagnosed with esophageal achalasia. Balloon dilation was performed and the obstruction was improved. He has been well without recurrence of achalasia.