A cavitated round opacity is present at the right lung base. It overlies the
back of the heart shadow on the lateral view. There are nodular opacities inside
the cavity and an air-fluid level is also visible. The location is thus right
lower lobe, with possible involvement of the posterior portion of the middle
lobe.
The definition of a mass is satisfied.
Malignancy is favored over inflammation because of the irregularity of the
inner wall of the cavity. The air-fluid level is not useful in differential
diagnosis; it indicates only that the bronchus connected to the mass is either
partially or intermittently obstructed.
Bronchogenic carcinoma, adenomatous
