Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding single view portable chest examination ___ ___ . Previously identified multiple left - sided displaced rib fractures as well as the surgically treated left - sided clavicular fracture appear all in unchanged position . The previously still present moderate - sized hydropneumothorax has disappeared and there is no evidence of any remaining pneumothorax in the apical area . At the left base ; however , there remain pleural thickenings , partially obscuring the diaphragmatic contour continuing in the lateral chest wall , which contains the multiple markedly displaced rib fractures . There is no evidence of any remaining free fluid . The posterior pleural sinuses are free on the lateral view convincingly identified , although the patient was unable to elevate her left arm . No new pulmonary parenchymal abnormalities identified .
    OUTPUT:
    
Remaining chest wall depression in the left hemithorax related to multiple displaced rib fractures and clavicular injury . Previously identified traumatic hydropneumothorax has disappeared . Pleural scar formations remain at base .