Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting semi-upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . On previous examination identified parenchymal infiltrates in the left lower lobe area have regressed . A mild blunting of the left lateral pleural sinus persists . No new parenchymal infiltrates are seen and no pneumothorax is present in the apical area . The previously described most total opacification of the right hemithorax persists rather unchanged . Multiple described calcifications observed on the previous examination overlying shoulder areas can not be seen anymore and thus represent external artifacts .
    OUTPUT:
    
Regression of previously identified left lower lobe infiltrates suspected to be of inflammatory origin in this patient with history of advanced right - sided pulmonary carcinoma . A left - sided pleural effusion stable blunts the lateral pleural sinus .