Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are stable . There is increased opacification within the left lower lobe , which given the short time interval , likely reflects a combination of the patient 's known malignancy with possible superimposed pneumonia or aspiration . There is unchanged pleural thickening of the left costophrenic angle . Right lower lobe lung nodule appears grossly unchanged . Other known lung nodules are not well assessed on the current radiograph . There is no new focal consolidation in the right lung or right - sided pleural effusion . Emphysematous changes are again seen . No pneumothorax is present . No definite acute osseous abnormalities are present . The pulmonary vasculature is not engorged .
    OUTPUT:
    
Increased opacification within the left lower lobe likely reflecting a combination of known lung malignancy with superimposed infection or aspiration .