Abstract
THE clinical aspects of any disease may be said to comprise a group of features that in the aggregate tend to classify it as a clinical entity. Some diseases have certain pathognomonic features that identify them immediately, whereas in others the clinical picture is simulated by such a variety of etiologic agents that it is impossible to be certain of the diagnosis except by careful study and the elimination of similar diseases. Such a condition is the syndrome of transient pulmonary infiltrations with blood eosinophilia, first described in 1932 by Loeffler,1 professor of medicine at the University of Zurich. By . . .