Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small right pleural effusion . Stable prominence of the perihilar interstitial markings is seen , slightly less conspicuous as compared to the prior study . There may be mild pulmonary vascular congestion . No new focal consolidation is seen . The cardiac and mediastinal silhouettes are stable . Chronic appearing deformity of the posterior lateral left fifth rib is seen . There is an acute appearing fracture of the posterior left fourth rib .
    OUTPUT:
    
Acute appearing fracture of the posterior left fourth rib . Nondisplaced left third rib fracture better seen on CT .