emphysema of the skin is not a true disease of the skin, but it is mentioned as a pathological condition.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
emphysema is a rupture of the minute air vesicles of the lung substance, and may be either interlobular or vesicular.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
He showed the difference between bronchitis and pneumonia, pneumonia and pleurisy, and the various forms of tuberculosis and even the rarer pathological conditions of the lung, such as cancer, or the more familiar conditions usually not associated with fever, emphysema, and some of the forms of retraction.
"Makers of Modern Medicine"
James J. Walsh