Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The medial head of the right clavicle , may obscure a parenchymal opacity in the right upper lobe . Lungs are otherwise clear . Cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Possible right apical lung infection or other lesion , obscured by the medial head of the clavicle .