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Hydropneumothorax
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<p>Hydropneumothorax is defined as the presence of both air and fluid within the <a href="/facts/Pleura/A5E7jwNe">pleural space</a>. An upright chest <a href="/facts/X-ray/wseP79cN">x-ray</a> will show air fluid levels. The horizontal fluid level is usually well defined and extends across the whole length of one of the hemi<a href="/facts/Thorax/lwtzfc8K">thorax</a>. </p>