Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right hemodialyisis catheter ends in the right atrium . There is widespread abnormality in the lungs , consisting mostly of subcentimeter nodules and interstitial linear opacities extending from upper to lower lungs , but worse in the lower . There are punctate hilar calcifications but no nodal or hilar vascular enlargement . There are no pleural effusions or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Widespread nodular and linear opacities , worse in lower lungs with associated hilar nodal calcifications , not typical of cystic fibrosis . These findings raise the possibility of active infection , malignancy or sarcoidosis .