Flat waist sign

The flat waist sign refers to flattening of the contours of the aortic arch and adjacent pulmonary trunk. It is seen in severe left lower lobe collapse and is caused by leftward displacement and rotation of the heart.

Chest x-ray
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Article information

rID: 4898
System: Chest
Section: Signs
Tag: refs, stub, cases
Synonyms or Alternate Spellings:

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