Cardiothoracic Imaging
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Hilar adenopathy




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Lateral radiograph
Computed tomography
Follow-up radiograph


COMMENTS

Enlargement of one or both hila must distinguish between lymphadenopathy vs. vascular enlargement. With few exceptions, vascular enlargement produces a branching pattern at its borders and generally is bilateral, whereas lymphadenopathy is more spherical or elipsoidal. Bilateral lymphadenopathy occurs with a variety of immunological disorders as well as sarcoid, but unilateral adenopathy results from either unilateral pulmonary infection or, more ominously, malignant tumors.


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December 18, 2004 (PL)
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