Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Although the tracheal air column is well visualized throughout most of its course , there is apparent filling defect in the lower trachea at the level of the carina and origin of left main bronchus . Heart size , mediastinal and hilar contours are normal . Lungs are clear except for focal linear atelectasis versus scar at left lung base peripherally . No pleural effusion or acute skeletal finding .
    OUTPUT:
    
Questionable intraluminal opacity within the lower trachea at origin of left main bronchus . Given history of hemoptysis , further evaluation with chest CT is recommended , as entered into radiology communications dashboard on ___ .