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Cases
Luftsichel Sign
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Case
A
chest radiograph was obtained in a 74-year-old man to evaluate
for progressive dyspnea.
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Scroll
down for Hint and Answer
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***** HINT *****
Luft = air; sichel = crescent.
***** ANSWER *****
Collapse of the left upper lobe: With complete
collapse, the left upper lobe retracts medially and superiorly. The
superior segment of the left upper lobe hyperextends and produces a
crescent of lucency along the mediastinum and aortic knuckle. This
crescent of air is termed the luftsichel sign. Other features of left
upper lobe collapse are present, including tracheal deviation and
elevation of the hilum and the diaphragm.
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Contributed by:
Sat Sharma, MD
University of Manitoba
Editor:
Morley Lertzman, MD
University of Manitoba
Source
http://emedicine.com
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