Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: - Cardiomediastinal contours are suboptimally evaluated due to portable technique and low lung volumes . Heart is upper limits of normal in size . Lungs and pleural surfaces are clear .
    OUTPUT:
    
Although there is no bulky lymphadenopathy evident , it is difficult to exclude potentially clinically significant lymph node enlargement on this limited exam . Considering history of lymphoma , standard PA and lateral chest radiographs or a dedicated chest CT would be suggested if warranted clinically