Luftsichel sign (lungs)
Updates to Article Attributes
Body
was changed:
The Luftsichel sign is seen in some cases of left upper lobe collapse and refers to the frontal chest radiographic appearance due to hyperinflation of the superior segment of the left lower lobe interposing itself between the mediastinum and the collapsed left upper lobe.
Radiographic features
ChestPlain radiograph
In many cases of left upper lobe collapse, the anterior parts of the aortic arch, and thus the aortic knuckle, areis abutted by collapsed lung and thus the normal silhouette is lost. In some case the apical (superior) segment of the left lower lobe is hyperinflated and becomes interposed between the collapsed lung and the adjacent aortic arch. In such cases the aortic knuckle silhouette silhouette remains visible by a hyperlucent shadow extending from the apical lobe to the superior pulmonary vein 2. The collapsed left upper lobe is thus displaced laterally away from the mediastinum.
History and etymology
It is derived from the German words luft = air, sichel = sickle, literally describes an ‘air crescent’ which may be seen between the aortic arch and the medial border of the collapse.
Differential diagnosis
- right lung herniation
- pneumomediastinum
- lung cancer
-<p>The <strong>Luftsichel sign</strong> is seen in some cases of <a href="/articles/left-upper-lobe-collapse">left upper lobe collapse</a> and refers to the frontal chest radiographic appearance due to hyperinflation of the superior segment of the left lower lobe interposing itself between the mediastinum and the collapsed left upper lobe. </p><h4>Radiographic features</h4><h5>Chest radiograph</h5><p>In many cases of left upper lobe collapse the anterior parts of the aortic arch, and thus the aortic knuckle, are abutted by collapsed lung and thus the normal silhouette is lost. In some case the apical (superior) segment of the left lower lobe is hyperinflated and becomes interposed between the collapsed lung and the adjacent <a href="/articles/aortic-arch">aortic arch</a>. In such cases the <a href="/articles/aortic-knuckle">aortic knuckle</a> silhouette remains visible by a hyperlucent shadow extending from the apical lobe to the superior pulmonary vein <sup>2</sup>. The collapsed left upper lobe is thus displaced laterally away from the mediastinum.</p><h4>History and etymology</h4><p>It is derived from the German words <strong>luft</strong> = air, <strong>sichel </strong>= sickle, literally describes an ‘air crescent’ which may be seen between the aortic arch and the medial border of the collapse.</p><h4>Differential diagnosis </h4><ul>- +<p>The <strong>Luftsichel sign</strong> is seen in some cases of <a href="/articles/left-upper-lobe-collapse">left upper lobe collapse</a> and refers to the frontal chest radiographic appearance due to hyperinflation of the <a title="Left lower lobe superior segment" href="/articles/left-lower-lobe-superior-segment">superior segment</a> of the <a title="Left lower lobe" href="/articles/left-lower-lobe">left lower lobe</a> interposing itself between the <a title="Mediastinum" href="/articles/mediastinum">mediastinum</a> and the collapsed <a title="Left upper lobe" href="/articles/left-upper-lobe">left upper lobe</a>. </p><h4>Radiographic features</h4><h5>Plain radiograph</h5><p>In many cases of left upper lobe collapse, the anterior parts of the <a title="Aortic arch" href="/articles/aortic-arch">aortic arch</a>, and thus the aortic knuckle, is abutted by collapsed lung and thus the normal silhouette is lost. In some case the apical (superior) segment of the left lower lobe is hyperinflated and becomes interposed between the collapsed lung and the adjacent <a href="/articles/aortic-arch">aortic arch</a>. In such cases the aortic knuckle silhouette remains visible by a hyperlucent shadow extending from the apical lobe to the superior <a title="Pulmonary veins" href="/articles/pulmonary-veins">pulmonary vein</a> <sup>2</sup>. The collapsed left upper lobe is thus displaced laterally away from the mediastinum.</p><h4>History and etymology</h4><p>It is derived from the German words <strong>luft</strong> = air, <strong>sichel </strong>= sickle, literally describes an ‘air crescent’ which may be seen between the aortic arch and the medial border of the collapse.</p><h4>Differential diagnosis </h4><ul>
-<li><a title="Pneumomediastinum" href="/articles/pneumomediastinum">pneumomediastinum</a></li>-<li><a title="Lung cancer" href="/articles/lung-cancer-3">lung cancer</a></li>- +<li><a href="/articles/pneumomediastinum">pneumomediastinum</a></li>
- +<li><a href="/articles/lung-cancer-3">lung cancer</a></li>
References changed:
- 1. Grainger RG, ADAM A, Dixon AK. GRAINGER & ALLISONS DIAGNOSTIC RADIOLOGY. Churchill Livingstone. (2007) ISBN:0443101639. <a href="http://books.google.com/books?vid=ISBN0443101639">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0443101639?ie=UTF8&tag=radiopaediaor-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=0443101639">Find it at Amazon</a><div class="ref_v2"></div>
- 1. Grainger RG, ADAM A, Dixon AK. GRAINGER & ALLISONS DIAGNOSTIC RADIOLOGY. Churchill Livingstone. (2007) ISBN:0443101639. <a href="http://books.google.com/books?vid=ISBN0443101639">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0443101639?ie=UTF8&tag=radiopaediaor-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=0443101639">Find it at Amazon</a><div class="ref_v2"></div>
Tags changed:
- refs
Unable to process the form. Check for errors and try again.