Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath is again noted terminating within the lower SVC . There is again seen a opacity at the left base posteriorly which may represent recurrence of the patient 's rounded atelectasis as seen on the prior CT scan . Follow resolution is recommended . Mild cardiomegaly is unchanged .
    OUTPUT:
    
Rounded opacity within the left posterior base . This may represent rounded atelectasis as seen on the prior radiograph from ___ . Follow up to resolution is recommended .