Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Recently described left lower lobe opacity corresponds to a combination of linear parenchymal scarring and a partially calcified pleural abnormality on recent CT abdomen of ___ . This appears similar to the previous chest radiograph . On the right , note is made of a localized extrapleural lipoma in the periphery of the right mid lung region , which has also been characterized on the CT abdomen study . Lungs and pleural surfaces are otherwise clear , and cardiomediastinal contours are within normal limits .
    OUTPUT:
    
Persistent opacity in left lower hemithorax , which corresponds to linear parenchymal scarring and a partially calcified pleural abnormality on CT abdomen of ___ . These findings are most likely the sequela of previous hemothorax or empyema , but followup CT could be obtained in six months from the prior CT scan to ensure stability and to exclude an active process in this region .