Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right indwelling catheter again seen , with tip near SVC / RA junction , possibly over the upper right atrium . The tip appears retracted compared with the ___ radiograph . No pneumothorax is detected . Heart size at the upper limits of normal . Cardiomediastinal silhouette is otherwise within normal limits . No CHF , focal infiltrate or effusion is identified . Incidental note is made of patchy density in the visualized portion of the left proximal humerus , extending beyond the edge of this film .
    OUTPUT:
    
No acute pulmonary process identified . Mixed lucent sclerotic focus in the left proximal humerus , not fully evaluated . Given location , this could represent an enchondroma or other chondroid lesion . However , given the history of lymphoma , further characterization with dedicated left humerus radiographs is recommended . Note is made that this lesion is visible on a FDG PET CT from ___ , at which time no concerning uptake in this area was reported .