Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Within the left retrocardiac region , projecting lateral to the costochondral calcifications , there is a 5 .6 x 2 .8 cm radiodense structure of uncertain etiology , possibly related to summation of normal thoracic structures . The lungs are otherwise clear . The heart is top normal in size . The mediastinal contours are normal . There are no definite pleural effusions . No pneumothorax is seen . Marked dextroscoliosis of the thoracic spine is noted .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Indeterminate 5 .6 cm amorphous structure projecting over the left retrocardiac region . While this may be related to summation of normal thoracic structures , further evaluation with dedicated PA and lateral radiographs is recommended . Pertinent findings and recommendations were discussed with Dr . ___ by Dr . ___ at 3 :35 p .m . via telephone on the day of the study .