Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volume is low . There is an ill - defined hazy opacity with uniform density obscuring the left heart border concerning for infarction versus infection in the left upper lobe . However , the appearance is not typical of pneumonia . Atelectasis in the left lung is also appreciated . The pulmonary venous congestion is unchanged from prior . There is also bilateral diffuse interstitial opacities , not fully explained by pulmonary venous congestion . There is minimal pleural effusion bilaterally . No pneumothorax . The cardiomediastinal silhouette is normal . No fractures . The right Port - A - Cath terminates at cavoatrial junction .
    OUTPUT:
    
1 . The left upper lobe ill - defined opacity is concerning for infarction versus infection but the appearance is atypical of infection . 2 . Diffuse interstitial opacities of unclear etiology . 3 . Unchanged pulmonary venous congestion .