Left upper lobe atelectasis with luftsichel sign

Case contributed by Dr Yair Glick

Presentation

Suspicion of peanut aspiration.

Patient Data

Age: 1.5 years

LUL atelectasis with compensatory hyperinflation of the contralateral lung superimposed on the aortic knob - luftsichel sign.

The sign can be seen more clearly on the image with exaggerated contrast.

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