2021 Volume 35 Issue 6 Pages 693-698
A 67-year-old man was scheduled to undergo catheter ablation for paroxysmal supraventricular tachycardia (PSVT), but was referred to our department because a mediastinal cyst was found. The cyst was 44 mm in size and under the tracheal bifurcation. It was compressing the esophagus, left upper pulmonary vein, and left atrium. Operative findings revealed the cyst to be benign without a solid component, but close adhesion was observed to the esophagus, superior pulmonary vein, and left atrium. The adhesion was not peeled off, the cyst wall was partially removed, and the mucosa was cauterized. Histologically, columnar epithelium and cartilage were observed, and it was considered to be a bronchial cyst. The arrhythmia disappeared postoperatively. Bronchial cysts with arrhythmia are rare, and only 11 cases have been reported globally.
