The Probert Encyclopaedia of Medicine

EMPHYSEMA

Emphysema is an abnormal presence of air in certain parts of the body. Generally however the term is restricted to a peculiar affection of the lungs, exhibited in two forms, vesicular emphysema, dilation or rupture of the air-sacs, and interlobular emphysema, infiltration of air into the connective tissue beneath the pleura.
Research Emphysema