132 PEINOIPLES OF TETEEINABT SURGERY 



paralysis, while tuberculosis of the spinal cord may produce 

 locomotor ataxia or paraplegia. 



Describe the trecdment of tuberculosis 9 



Generally speaking, such patients are not treated, for 

 obvious reasons ; while in disease of the testicles or ovaries 

 castration or spaying may be attempted. 



CONCRETIONS AND FOREIGN BODIES. 



What is a concretion ? 



A stone-like mass, a sediment of an earthy basis from 

 retained secretions or excretions of the body. , 



Enumerate the concretions of surgical interest. j 



1. Renal calculi. 2. Intestinal calculi. 3. Salivary cal- 

 culi. 4. Lacteal calculi. 5. Praeputial calculi. 6. Eice 

 kernel calculi. 



Where do you find renal calculi f 



In the kidney, pelvis of the kidney, bladder and urethra. ' 

 What is their composition ? 



Silicates, urates, triple phosphate, carbonate and oxalate 

 of lime, etc. 



How are they formed ? 



1. As a result of disease of the renal mucous membranes, 

 colloids (mucus, epithelium, blood, pus) are present. These 

 colloids form a nucleus around which the earthy salts of the 

 urine are precipitated, eventually becoming calculi. 



2. Through the agency of bacteria, which, by producing 

 an ammoniacal fermentation, bring about precipitation of 

 triple phosphate. 



