PMC5960538_01
PA chest radiograph demonstrates complete left upper lobe atelectasis and the luftsichel sign.
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fig1
Initial chest radiograph showed the luftsichel sign (i.e., complete atelectasis of the left upper lobe) and trace left pleural effusion (Figure 1).
Axial PET/CT image demonstrates avid FDG uptake by the left upper lobe mass.
CRIRA2018-8574642.003.jpg
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fig3
The PET-CT demonstrated focally increased metabolic activity within the left upper lobe which was favored to represent lung cancer or, less likely, metastatic disease (Figure 3).