Pleural effusion caused by trapped lung.

We report a case of pleural effusion from trapped lung secondary to sarcoidosis. The patient presented with dyspnea, right pleural effusion, left and right upper-lobe infiltrate and a widened mediastinum. The pleural effusion and dyspnea failed to respond to a course of oral corticosteroids but was relieved by decortication with stripping of inflammatory fibrous bands encasing the visceral pleural. Histologic examination of the lung, visceral and parietal pleura, and the fibrous adhesions all revealed noncaseating granulomas.