[Two successful cases of paraesophageal bronchogenic cysts]

Paraesophageal bronchogenic cyst is a rare disease. Only 24 cases have been previously reported in Japan. Recently, we experienced two successful cases of this disease. Two cases (64-year-old man and 31-year-old man) were both asymptomatic and pointed out by chance on the chest X-ray at the left posterior mediastinum. The second case was an intramural esophageal cyst. Microscopic examination showed the typical findings of the bronchogenic cyst, as the inner wall of the cyst was covered with ciliated columnar epithelium and the wall consisted of cartilage, mucous glands and smooth muscle. Both postoperative courses were uneventful. Resection was recommended because of the symptoms due to the compression of the cyst and the possibility of malignancy.