BENIGN TUMORS AND CYSTS. 
353 
ing very much smaller fibre cells, the other is simply a hyper¬ 
trophy of muscular tissue. The former are usually found in 
some portion of the genito-urinary tract. The latter are associ¬ 
ated with a preponderance of connective tissue resembling a 
fibroma, and hence often called fibro-myoma. These occur in 
the uterus, vagina, bladder, testicle, prostate, scrotum, oesopha¬ 
gus, stomach and intestines. The tumor is firm in consistence, 
being spherical or pyriform, and has a white or flesh-colored 
appearance when laid open. The growth of these tumors is 
often arrested and in some cases diminished by the use of ergot. 
This acts by inducing muscular contraction, and hence lessens 
blood supply. If the growth is of such a size that it hinders 
the animal or jeopardizes its life, they may be extirpated either 
through natural channels or through an abdominal incision. 
o o 
Lymphoma may be divided into two classes—the soft and 
hard. In the soft, all the cells of the lymph gland are greatly 
increased in size and number, while in the hard kind there is a 
preponderance of connective tissue and a diminished number of 
lymphoid cells. 
The diagnostic symptoms of lymphoma are that they usu¬ 
ally occur in thriving young animals, and affect a whole chain 
of glands of a limited area of one side of the body. They have 
no tendency to suppuration or caseous change, and do not excite 
inflammation in surrounding tissue. A lymphoma, under any 
circumstances, gives just cause for apprehension, and, if consti¬ 
tutional contamination occurs, the case is as hopeless as carci¬ 
noma. 
Treatment.—Iodine and arsenic both internally and exter¬ 
nally and iodoform dressing. Their removal with the knife is 
usually unsatisfactory. 
Angioma is a tumor composed of blood vessels supported by 
connective tissue, and is known under various names, as erectile 
tissue, aneurism by anastomosis, etc. These are helped and 
often removed by application of actual cautery or by enucleation. 
CYSTS. 
All cysts may be divided into two general classes—retention 
