BENIGN TUMORS AND CYSTS. 
355 
Or, if in a favorable location, they may be dissected ont. The 
latter method is probably the preferable one. 
A neoplasmic cyst is filled with a fluid secreted by its lining 
membrane. The fluid may be thin or serous, thick or viscid. 
These cysts may be simple or compound. The compound often 
enclose teeth, hair, etc. When enclosing teeth they are called 
dentigerous cysts. 
The simple cysts may include capped hock, knee, elbow and 
fetlock, which may all be considered under one head. They all 
are usually the result of some external injury. At first there is 
a mere fusion of serum underneath the skin. This terminates 
in a serous abscess named from its location. 
Treatment may consist in the application of the following : 
Hydrarg. biniodide 3 ij 
Water 5 xij 
Pot. iodide q. s. to dissolve the mercury. 
Use until soreness occurs, then withhold and apply later. 
If this fails, may aspirate, use seton, or else perform a radical 
operation. 
Bronchocele , Derbyshire neck or goitre. These are cystic 
enlargements of the thyroid gland, the origin of- which is un¬ 
known. They are said to originate fiom the drinking water 
taken into the system. It is a soft fluctuating swelling of the 
thyroid gland, occupying one or both sides of the larynx. Al¬ 
though unsightly, they never interfere with the general useful¬ 
ness of the animal. 
Treatment:— 
IIodine 3 j 
Pot. iodide 3 j 
Uard 3 viij 
Apply once a day until soreness is produced. If very 
obstinate give 3 i of pot. iodide three times a day for eight days- 
Parasitic cysts are a class of the compound neoplasmic 
cysts. These are cysts containing larvae of some parasite. 
Cysts containing teeth are found in the testicles and other 
parts of the body, but the favorite locality of these is within the 
