Dark bronchus sign

Changed by Henry Knipe, 18 Aug 2014

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~~The~~ ~~dark~~Dark bronchus sign is the appearance of relatively darker bronchus to the adjacent ground glass opacity. If the ground glass opacity progress to consolidation, air bronchograms will be visualised. ~~This~~

This sign is useful to identify diffuse ground glass opacity on HRCT in cases of Pneumocystis jirovecii pneumonia who may present with a normal or equivocal chest radiograph in the early course of disease ¹.

-The dark bronchus sign is the appearance of relatively darker bronchus to the adjacent ground glass opacity. If the ground glass opacity progress to consolidation, air bronchograms will be visualised. This sign is useful to identify diffuse ground glass opacity on HRCT in cases of <a title="Pneumocystis carinii pneumonia" href="/articles/pneumocystis-pneumonia">Pneumocystis jirovecii pneumonia</a> who may present with a normal or equivocal chest radiograph in the early course of disease 1.
+Dark bronchus sign is the appearance of relatively darker bronchus to the adjacent <a title="Ground glass opacities (GGO)" href="/articles/ground-glass-opacity">ground glass opacity</a>. If the ground glass opacity progress to <a title="Pulmonary consolidation" href="/articles/air-space-opacification-1">consolidation</a>, <a title="Air bronchograms" href="/articles/air-bronchogram">air bronchograms</a> will be visualised. This sign is useful to identify diffuse ground glass opacity on HRCT in cases of <a href="/articles/pneumocystis-pneumonia">Pneumocystis jirovecii pneumonia</a> who may present with a normal or equivocal chest radiograph in the early course of disease 1.

References changed:

3. Prokop M, Galanski M. Spiral and Multislice Computed Tomography of the Body. TIS. ISBN:B005TGA7A8. <a href="http://books.google.com/books?vid=ISBNB005TGA7A8">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/B005TGA7A8">Find it at Amazon</a>

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