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

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(Click here for the answer)

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

Chambered effusions with CT

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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

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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

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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

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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.