Findings detected with computed tomography. Panel A. Coronal CT of the chest showing left-sided lung collapse. Panel B. Axial CT of the chest revealing a pleural effusion (E) and the collapsed left lung (L). There is left mediastinal shift; the right lung is hyper-inflated. Panel C. Three dimensional (3D) reconstruction with volume rendering depicting complete collapse of the left lung with an obstructed left main bronchus. Panel D. Skeletal system removed from the 3D reconstruction.