Here, alveolar walls are no longer visible because there is early abscessformation.
图中不见肺泡壁，因为早期有脓肿形成。
2
Extensive acute inflammation may lead to abscessformation, as seen here with rounded abscesses (the purulent material has drained out after sectioning to leave a cavity) in upper lobe and lower lobe.
The biodegradation pattern in vivo was similar to that in vitro. There was no abscessformation and tissue necrosis surrounding the implanted materials.