[Pleurisy of unexpected etiology: a foreign body within the pleural cavity]. / Pleurésies d'étiologie inattendue: le corps étranger au sein de la cavité pleurale.

Following three brief clinical reports, we review the literature concerning a rare cause of exudative pleural effusion: the presence of a foreign body in the pleural cavity. Frequently iatrogenical, this rare etiology of pleural effusion must be envisaged when this complication develops after any invasive peri-thoracic surgery and must be included in the differential diagnosis of recurrent pleural effusions. These effusions have a favorable prognosis after withdrawal of the foreign body.