Clinical history

59 y-o man who underwent 1 month earlier coronary bypass surgery. Subsequent large bilateral pleural effusion with spontaneous relief.

Radiological findings

Frontal chest radiograph. Right and left sulcus are obliterated. Ill-defined linear opacities in Right and Left hemithoraces. Pleural thickening mainly on the left hemithorax.
Lateral view.Posterior round mass (star) abutting the right chest wall with radiating opacities. Posterior sulcus obliterated.

CT findings

Round mass (star) abutting the posterior chest wall with thickened pleura on both sides.
Frontal thick CT section. Right posterior mass and thick horizontal lines on both sides.
Sagittal CT thick section on the left hemithorax. Crowding of bronchi and vessels towards the posterior round mass (star). Left posterior sulcus obliterated by a thickened pleura.

Extra Examinations

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Final diagnosis

Round atelectasis of the right lung. Bilateral fibrous changes of pleura with characteristic crowfeet appearance and transpulmonary nonseptal lines. Complete regression observed 6 month later.

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