Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . An ill - defined ovoid opacity is noted in the left mid lung , with a correlate that abuts the major fissure in the lateral view , extending into the upper lobe . No other focal opacities are present . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Left upper lobe pneumonia . Recommend follow - up to resolution to exclude underlying lesion .