作者: Richard O. Friday
DOI: 10.1001/JAMA.1973.03230010056024
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摘要: To the Editor.— Pleuropericardial cysts rarely cause symptoms, and they are usually discovered as an incidental finding on a chest x-ray film. Their importance rests with problem of distinguishing them from malignant tumors. most commonly occur in right cardiophrenic angle, but other sites such left hila, anterior mediastinum have been reported. The majority between 3 8 cm diameter film seen smooth, sharply demarcated, spherical or oval masses. If cyst extends middle lower lobes, superior portion may be flattened so that assumes shape teardrop. 1 In past, thoracotomy was necessary to prove these asymptomatic masses were benign. We recently examined patient paracardiac mass established its cystic nature by ultrasound examination; benignity