Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in upright position . Available for comparison is the next preceding chest examination of ___ . Relatively high positioned diaphragms obscure major portion of the heart shadow . The heart size may be at the upper limit of normal variation , but no typical configurational abnormalities identified . Unremarkable and unchanged appearance of thoracic aorta . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present and the lateral pleural sinuses are free . No evidence of pneumothorax in the apical area . Skeletal structures of the thorax grossly unremarkable . On previous examination of ___ , small left - sided pleural effusion was diagnosed . This can not be confirmed as a lateral view was not obtained at this time .
    OUTPUT:
    
Mostly unremarkable chest findings on single view examination .