60 DISEASES OF THE LUNGS 



Course and Prognosis. — The course is usually chronic, the 

 disease lasting for weeks or even months. The prognosis is 

 bad for, although death may not always ensue, the patient 

 is left with a chronic incurable dyspnea. 



Treatment. — Treatment "is of no avail. Life may be 

 prolonged by treating as in catarrhal pneumonia. Edible 

 animals should be slaughtered. In horses fibrolysin (gr. xv) 

 given subcutaneously' every other day is recommended. 



TUMORS IN THE LUNG. 



While tumors in the lung are not uncommon they rarely 

 attain clinical importance, as the diagnosis is so difficult. 

 They sometimes produce symptoms of dyspnea, pulmonary 

 hemorrhage, flatness on percussion and emaciation. Fever 

 is not present and the course is chronic. Many of them 

 originate by metastasis. The most common tumors are 

 sarcomas, melanomas, adenomas, fibromas, and in aged 

 animals particularly carcinomas. 



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