One the initial review of the first film the hilum looks dense and enlarged with the immediate concern for malignancy.

On closer interrogation - the abnormality is perihilar in location and the history of fever in a young non-smoker is strong for infection.

A confident and sensible clinician has given appropriate treatment (antibiotics in this case) and a follow up chest x-ray with a normal 6-week film confirming infection rather than performing a knee-jerk CT chest.