DEPARTMENT OF SURGERY. 
837 
1. Tumors of adrenals. 
2. Cysts. 
3. Abscesses. 
(b) Renal pelvic growths. 
1. Pyonephrosis. 
2. Villous tumors. 
3. Carcinoma. 
4. Hydronephrosis. 
5. Sarcoma. 
( c ) Cortical and capsular growths. 
1. Carcinoma. 
2. Sarcoma. 
3. Adenoma. 
4. Fibroma. 
5. Lipoma. 
6. Cysts. 
7. Tuberculosis. 
8. Secondary growths. 
Diseases of the kidney of domestic animals is more common 
than it is generally accepted to be ; and it is interesting to note 
to what extent they may be involved without being detected 
during life. Very frequently upon post-mortem, the kidney is 
found so diseased that it is almost useless, and in some cases 
they attain enormous size. Our observations lead us to this 
conclusion : that renal diseases are more common to young ani¬ 
mals and very old ones, than to middle-a^ed ones. I11 vouno- 
animals the most common conditions are sarcoma and hydrone- 
phosis, while in old ones we usually find cysts, abscesses, pyone¬ 
phrosis and secondary growths. We have often noticed animals 
with one kidney badly diseased and the other one perfectly 
sound, but the condition was never detected before the animal 
was slaughtered. Whether or not renal diseases are so common 
in the horse as in meat producing animals we are unable to 
state at present. In the past two years during the dissecting 
of equine subjects at this institution (McK. V. C.), we have 
noticed but two diseased kidneys; one had an abscess in the pelvic 
portion of the kidney, and the other a secondary growth in the 
cortical portion. 
Renal Fistula .—A urinary fistula in connection with the 
kidney and ureter is an indication for nephrectomy ; they may 
follow parturition, traumatic and surgical wounds, and in most 
cases break open in the direction of least resistance. When renal 
fistulse open into the peritoneal cavity the termination is gen- 
