Overpenetrated frontal chest radiograph showing complete right lower lobe atelectasis due to bronchogenic carcinoma. The collapsed right lower lobe forms a right paraspinal mass (large arrow). The residual hyperaerated right lung is smaller than the left lung. The right hilum is not visible since it is engulfed by the atelectasis. The major fissure shows a convex bulge which represents a variant of Golden's S sign and is formed by the tumor mass. Note the superior triangle sign formed by shift of the mediastinal fat and vessels to the right of the trachea.
Courtesy of Paul Stark, MD.
Graphic 81979 Version 4.0
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