276 PBINCIPLES OF VETEBINAEY SUEOEKT 



Lymphangiectasis. 



What is lymphangiectasis 9 



By it are understood .varicosities and dilatations of vari- 

 a.ble extent of lymph, vessels. 



lo what extent do they interest the veterinary swrgeon f 



More from the standpoint of comparative surgery, as they 

 are rarely seen in animals and belong to the domain of 

 tumors. 



DISEASES OF QLANDS. 



Ijyiupliadenitis. 



IV hat is lymphadenitis ? 



An inflammation of a lymph gland. 

 What are the causes of lymphadenitis ? 



Any irritant, usually an infectious agent. 

 W hy are lymphatic glands so prone to inflammation ? 



The fact that they are reservoirs, receiving whatever 

 material the lymph, vessels gather, explains it. 



How does septic material reach the lymph glands ? 



First from without, via the lymph vessels ; in these cases 

 there is also a lymphangitis present, the infection being car- 

 ried there by the lymph vessels ; this form is known as 

 lymphogenous adenitis. The second manner in which the 

 septic material may reach the gland is through the blood cur- 

 rent ; this form is termed hematogenous adenitis. 



