Cardiothoracic Imaging
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Image finding: Loss of cardiac border




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Follow-up radiograph

COMMENTS

Pneumonic infiltration of the lingula increases the density lung immediately adjacent to the left cardiac border. The presence of two areas of similar soft tissue density results in a loss of the conventional sharp boundary to the heart. The radiographic appearance of a sharp boundary at the left cardiac border would still be present if the lung density were located posterior to the heart, say in the left lower lobe.

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December 18, 2004 (PL)
version b.003