Nontuberculous mycobacterial disease concomitant with a pulmonary artery occlusion caused by Takayasu's arteritis.

We herein describe a surgical case of pulmonary involvement in Takayasu's arteritis with pulmonary infections of nontuberculous mycobacteria. A 24-year-old female was admitted to our hospital because of a recurrent fever, and contrast-enhanced computed tomography of the chest revealed the occlusion of the right pulmonary artery and cavitary lesions in the right lower lobe of the lung. A further examination of the neck revealed the occlusion of aortic branches, and the patient was diagnosed with Takayasu's arteritis. The cavitary lesions were diagnosed as nontuberculous mycobacteria disease according to the sputum culture result of Mycobacterium intracellulare. After antibiotic treatment for 6 months, the right pneumonectomy was performed with a good result. We should be aware of Takayasu's arteritis as a disease which can lead to the development of unexplained respiratory symptoms due to pulmonary artery involvement in young adults.