374 TUMOUKS OF THE HEART. 



and replaced by innumerable oil-globules. I have, however, 

 shown that in a case of dilatation the heart was fatty, so that, 

 apart from the tendency to obesity in some cases, and of pre- 

 mature decay in others, when various tissues are disposed to 

 undergo fatty transformation, the heart is implicated by a 

 similar retrograde change. 



The symptoms are those of dilatation already given, and 

 treatment is of no avail. 



Amongst the cardiac affections of a chronic nature, and 

 which are rarely diagnosed during life, we must class 



TUMOURS OF THE HEART. 



There is a great variety of cardiac tumours. Those that 

 1 have more frequently witnessed are 1. Parasitic growths, 

 either internally situated or attached to the apex of the heart. 

 2. Melanotic tumours in the substance of the heart. 3. 

 Fibrinous tumours, or cardiac polypi, properly so called. 

 4. Vascular tumours. 5. Cancer. 



It is evident that the importance of these organic dis- 

 orders varies as much from the position of the growth as 

 from its size and tendency to interfere with the heart's action. 

 The presence of a small obstruction within the heart is cal- 

 culated to endanger an animal's life far more than an exter- 

 nal tumour. Thus, a polypus forming within the auricle 

 may drop on the corresponding auriculo- ventricular opening 

 and arrest the blood's flow. It is remarkable that, as shown 

 by case 2, reported below, a large polypus may have its 

 pedicle in the auricle, and continue growing in the ventricle 

 to the extent of filling the latter, and yet the animal died 

 suddenly without having previously shown signs of ill health. 

 I have here to repeat that the temperament, habits, and 

 manner of keeping cows tied up in a stall, lead to the obser- 

 vation of cases in these animals which would give rise to 



