Primary Pulmonary Anaplastic Large Cell Lymphoma: A Rare Malignancy and Rare Cause of the Luftsichel Sign

Figure 2

(a) Axial CT image of the same patient at the level of the pulmonary trunk demonstrates a central mass obstructing the left upper lobe bronchus with resultant collapse of the left upper lobe

(b) Corresponding coronal CT image better demonstrates complete left upper lobe atelectasis. The obstructing central mass is again seen