[Ultrasonographic findings of diseases in peripheral lung fields using transtracheobronchial endoscopic ultrasonography (TUS)].

Nineteen patients with diseases in peripheral lung fields, including 14 with lung cancer, 1 brochiectasis, 1 with pleural effusion, 1 with sclerosing haemangioma and 2 with inflammatory lung diseases were examined with transtracheobronchial endoscopic ultrasonography (TUS) using an Olympus EU-M 20 and UM-2 R (12 MHz) or UM-3 R (30 MHz). The internal structures of the lesions, including necrosis and bronchial tissues, were readily observable, as were the intrapulmonary lymph nodes, including the swollen and heterogenous internal structures of metastatic lymph nodes. TUS is useful for diagnosis of peripheral lung diseases.