Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A retrocardiac opacity which appears to localize to the left lower lobe is noted , corresponding with patient 's known left lower lobe mass . There is an associated , small , left pleural effusion , similar appearance to the patient 's prior PET - CT examination . The remainder of the lung parenchyma is grossly clear , without focal consolidation , pneumothorax or pulmonary edema identified . The heart size is normal . The mediastinal and hilar contours are normal .
    OUTPUT:
    
No radiographic evidence for acute cardiopulmonary process . Findings were conveyed by Dr . ___ to Dr . ___ ___ telephone at 11 : 18 on ___ , 5 minutes after discovery .