Water bottle sign – refers to the shape of the cardiac…

Water bottle sign – refers to the shape of the cardiac silhouette on erect frontal chest x-rays in patients who have a very large pericardial effusion. The fluid, often measuring a litre or more, causes the pericardium to sag mimicking an old-fashioned water bottle sitting on a bench. Typically the effusion has accumulated over many weeks (e.g. in patients with malignancy) and the pericardium has gradually stretched. Coronal CT image is shown for correlation. 

from our tumblr blog: http://radiologysigns.tumblr.com/post/27608746064

http://radiologysigns.tumblr.com/

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