160 Neoplasms of the Lungs. 



Roentgenogram <nu\ even in larger animals if they are tolerably large 

 and sitnated back of the shonkler. 



However, a diagnosis of tnmor can be made Avith a good deal of 

 probal)ility only if a primary neojjlasm can be detected in the body, if 

 the pnlmonary affection can be referred to it and especially if a gradnal 

 enlargement of the axillary glands and those at the apertnre of the 

 thorax can ])e observed. Metastases in the Inngs are particularly fre- 

 quent in carcinoma of the thyroid in dogs. 



Solitary pnlmonary tumors may possibly be removed by operative 

 procedure (Parascandolo, A. f. Tk., 1902, XXXIII, 188; Pansini, Oe. 

 M., 1907, 289). 



Proliferation of the alveolar epithelia in the smallest bronchi leads, 

 frecpiently in sheep, not uncommonly in adult cats, to the formation of 

 nodules of the size of a hazelnut to an apple. They are grayish-white 

 to reddish-gray in color, of homogeneous lardaceous consistency and 

 occasionally become confluent to form larger tumors. These formations 

 have been called "multiple adenomata" by Eber and Prosch, and "poly- 

 adenomata bronchiale" by Ball. They appear to arise in connection 

 with a bronchopneumonia in sheep (Prosch) and they do not seem to 

 lead to any disturbance of health. Ball, however, saw in cats accelerated 

 and difficult respiration, cough, a gradual increase of the size of the 

 chest (emphysema of the lungs) without any disturbance of the general 

 condition of nutrition (on lironchopneumonia filiroplastica, see page 

 156), (Ball, J. vet., 1907, 71; Eber, Z. f. Tm., 1899, III, 161; Prosch. 

 Leipz. Ber., 1906, 7). 



