Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Retrosternal opacity and obscuration of the right paratracheal stripe may reflect an anterior mediastinal mass . Diffuse sclerosis of the upper thoracic vertebrae is concerning for possible sclerotic metastases . Normal hilar contours and pleural surfaces . Fully expanded , clear lungs .
    OUTPUT:
    
Likely anterior mediastinal mass that warrants further evaluation with CT chest . Upper thoracic vertebral sclerosis raises concern for metastatic disease , especially given the history of prostate cancer , and also warrants further evaluation with CT chest . No acute pneumonia .