横隔膜内気管支原性囊胞の1例

Intraphrenic Bronchogenic Cyst；Report of a Case

はじめに　気管支原性囊胞は，胎生期に前腸から発生した気管・気管支原基の異常発芽や迷入により発生すると考えられている．その発生部位はほとんどが縦隔であり，横隔膜に発生することはまれである1）．われわれは，横隔膜内に発生した気管支原性囊胞の1例を経験したので報告する．

Bronchogenic cyst is not a rare disease, but cases of bronchogenic cyst in the diaphragm are rare. We report a case of intraphrenic bronchogenic cyst. A 68-year-old woman was pointed out a 30 mm tumor on the left diaphragm by chest computed tomography （CT） 12 years ago. Because the size of the tumor had been increasing for 12 years, she was hospitalized for surgery. The tumor in the left diaphragm was removed by thoracotomy. Histologically, the tumor was diagnosed as a intraphrenic bronchogenic cyst.