flat waist sign
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
flat waist signImaging A loss of concavity of the left cardiac border, seen on a plain AP chest film, which corresponds to a slight anterior, right and oblique rotation of the heart, seen in left lower lobe collapse of the lung.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.