21. Both are the patient’s left hemithorax. (Right part of the picture is turned mirror-like) Between both x-rays the patient received antidiuretic therapy.

Interlobular effusion
Bild 21
(Click here for the answer)

Interlobular encapsulated effusion. It disappeared after therapy; the strongest argument against a solid mass.

Chambered effusions with CT
Bild 22
Irregular homogeneous masses in the neighbourhood of the chest wall and the mediastinum? Diagnosis?
(Click here for the answer)

Encapsulated effusion. The pleural space is a drawing of a life story. Multiple bonds often exist. Many kinds of pathology vary in shape and manifestation. (Normal anatomy does not show many variations).

Pleural effusions mag. resonance
Bild 23
What is the technique in this case? Which are the findings?
(Click here for the answer)

Magnetic Resonance Tomography (MRT); T2 weighted; no pathology of bile and pancreatic ducts. In the upper right quadrant of both images homogeneous fluid = pleural effusion. This was an incidental finding.

24. In sonography findings are typicaly dependent on
body position,
diaphragmal position and the
reaction produced by percussion. –

Pleural effusion sonography
Bild 24
Does this image contain an error?
(Click here for the answer)

It is inverted. The transonic effusion – shown here bright – is black in the usual procedure.

25. CT of an effusion. Same slice, 2 different displays.

Compression atelektasis
Bild 25
What has changed? What should be demonstrated?
(click here for the answer)

Effusion results in a restrictive lung lesion. Effusion always means (more or less) compression atelektasis. The moderate atelektasis is missed in the soft-tissue window (left), but shown clearly in the lung window. "Window" translates the "density" numbers in a black-and-white scale.