Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . The heart size is within normal limits . There exists a marked enlargement of the mid and superior mediastinal structures surrounding the lower portion of the trachea and bifurcation without evidence of significant constriction . On the frontal view , large rounded structure occupies the right - sided tracheobronchial angle and reaches up to the level of the clavicles . On the left side , there are even larger nodular densities apparently surrounding the rather normal - sized aortic arch and extending into the left hilar region . The lateral view discloses clearly that these masses are mostly oriented in the anterior mediastinal region . Although the central portion of the pulmonary vasculature is obscured , appearance of the pulmonary vessels in the periphery of the lung are rather unremarkable and there is no evidence of any acute pulmonary parenchymal infiltrate . Pleural spaces are also free without evidence of blunting in either lateral or posterior pleural sinuses and no evidence of pneumothorax exists in the apical area . Skeletal structures of the thorax grossly unremarkable . There exists no prior chest examination or records available for comparison .
    OUTPUT:
    
Bilateral mediastinal masses , otherwise unremarkable chest examination . The findings are strongly suggesting lymphoma . In the differential diagnosis , one may also consider thymoma as the masses have an anterior location on the lateral view . Stat report was delivered to Dr . ___ ___ #___ at 1 :50 p .m .