[Electroroentgenoscanning in the diagnosis of expanding mediastinal growths].

Thirty eight patients with the upper mediastinal tumours were examined by electroroentgenoscanning; 35 of these were operated on later and the diagnosis was confirmed. Comparison of the thyroid gland scannogram with the chest roentgenogram aided recognition of the nature of the detected formation. In cases of nonfunctional stromas the results of this method should be considered only in combination with other data.