Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Right lung is clear . Inferior to left pulmonary hilum is an irregular opacity which could represent a confluence of bronchovascular markings , though the possibility of nodule can not be excluded . Given the lack of recent prior studies , consider non-emergent CT to further assess . There is no definite sign of pneumonia or CHF . No effusion or pneumothorax . Cardiomediastinal silhouette appears normal . Bony structures are intact .
    OUTPUT:
    
Irregular opacity inferior to the left pulmonary hilum , unclear etiology . Consider non-emergent CT of the chest to further assess .