Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Complete collapse of the left lung is new compared to the prior radiograph . Right lung is slightly overexpanded but grossly clear , and there is no evidence of right pleural effusion . Known T9 vertebral body lytic lesion and small pulmonary nodules are seen to better detail on recent CT of ___ .
    OUTPUT:
    
Complete collapse of left lung with associated abrupt termination of left main bronchus , likely primarily due to acute mucus plugging given rapid development of collapse since recent CT . As discussed with Dr . ___ by telephone on ___ at 7 :45 a .m . at the time of discovery , bronchoscopy would be helpful for both diagnostic and therapeutic purposes , particularly given the presence of soft tissue thickening and irregularity of this bronchus on recent CT .