1. Pathological changes -- often starting at the visceral pleura between the pleura or leaves.

2. At a single millimeter in thickness, the visceral pleura is barely half the width of the parietal pleura.

3. Methods The visceral pleura intersegmental surface on 40 adult left lung specimens were incised and intersegmental planes were sought along "natural line of cleavage" in adjoining segments.

4. The dense white encircling tumor mass is arising from the visceral pleura and is a mesothelioma.

5. The ease of which it can be removed is dependant on which of the pleural surfaces becomes malignant: the parietal pleura or the visceral pleura.

6. Pathology. —Interstitial emphysema is characterized by air dissecting within the interstitium of the lung, typically in the peribronchovascular sheaths, interlobular septa, and visceral pleura.

7. The parietal pleura lines the inner chest wall and the visceral pleura encases the lungs.

8. Sequestrations are classified anatomically as intralobar sequestration, located within the normal lobe, and extralobar sequestration, located outside the normal lobe and with its own visceral pleura.

9. It directly covers the lung itself, which makes extraction of the visceral pleura without subsequent damage to the lung very difficult.