Abstract
A pulmonary lesion of sheep, apparently of infectious origin but resembling a tumor in its morphologic characteristics, has been known since about 1891. 1 It has received such varying names as jagziekte, epizootic adenomatosis, pulmonary adenomatosis and infectious adenomatosis. Very similar and probably identical conditions have been reported under the titles of verminous pneumonia and Montana progressive pneumonia of sheep. A considerable incidence has been found in areas as widely separated as South Africa, Saxony, England, Iceland and Montana. Similar changes have been seen in horses 3 and guinea pigs, 4 and as early as 1903 Lohlein 5 found a picture resembling it in a 69 year old woman. Since that time, the veterinary literature on the subject has become voluninous, and there have been several other human cases recorded. REPORT OF A CASE A white man aged 42 was admitted to the Wisconsin General Hospital April 19, 1941, with
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