Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the left upper lobe , there is a poorly defined small nodular opacity which warrants further evalution . There is moderate cardiomegaly . No pleural abnormality is seen . Osseous structure demonstrate generalized demineralization , with some loss of height in the mid thoracic spine .
    OUTPUT:
    
Small nodular opacity in left upper lobe could potentially be due to an early focus of pneumonia , but lung cancer is an additional consideration . Short - term followup radiograph after antibiotic therapy may be helpful to assess for resolution . Alternatively , chest CT could be considered for further characterization , particularly the patient has risk factors for lung cancer Moderate cardiomegaly .