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Isthmus (pleura)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The pleural isthmus, also termed mesopneumonium, is the reflection of parietal pleura medially from the lungs where it merges with the visceral pleura. In its superior section, it encapsulates the roots of the lungs. Inferiorly, it hangs free as the pulmonary ligament.


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