Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An ill - defined nodule is seen within the right upper lung zone , measuring roughly 1 .5 cm in diameter . There is no pneumothorax or pleural effusion . The heart size is normal . The hilar and mediastinal contours are within normal limits .
    OUTPUT:
    
Ill - defined right upper lung zone nodule . A CT examination could be obtained for further evaluation . A followup CT was performed shortly afterwards at 9 :06 a .m .-- please refer to that examination for further details regarding the right upper lung nodule .