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[Potentialities of ultrasound and computed tomography in the diagnosis of metastases of lung cancer in the mediastinal lymph nodes].

The results of routine roentgenotomography, CT and USI in the diagnosis of intrathoracic metastases of lung cancer were compared in 69 patients (central type--52, peripheral--17). These results were compared with operative findings in 45 patients. The sensitivity of USI in the diagnosis of enlarged paravasal lymph nodes exceeded that of roentgenotomography and was slightly inferior to CT. CT was informative for all mediastinal lymph nodes whereas tomography and USI were informative in certain areas only. The authors recommend to combine the use of routine and ultrasound tomography to assess the spreading of lung cancer to the mediastinum. The information obtained increases the accuracy of staging and specifying a process, slightly yielding CT results.