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<p>the prognosis is usually good. Complications of a hemothorax include <a href="page.php?w=Pleural_empyema">infection within the pleural cavity</a> and the <a href="page.php?w=Fibrothorax">formation of scar tissue</a>.</p>

<p><big> Background </big></p>
<p>The lungs are surrounded by two layers of tissue called the <a href="page.php?w=pulmonary_pleurae">pulmonary pleurae</a>. In most healthy people, these two layers are tightly apposed, separated only by a small amount of <a href="page.php?w=Pleural_cavity">pleural fluid</a>. In certain disease states,</p><p>
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