312 DISEASES OF CATTLE. 



in the district, remove the animal to another location when possible. 

 Iodine should be applied to the swelling, either in the form of oint- 

 ment or the tincture. Injections of iodine solution, 5 grains of iodine 

 in 1 dram of 25 per cent alcohol, may also be made into the substance 

 of the gland. When the swelling which follows this injection has 

 subsided it may be repeated. Potassium iodid should be given 

 internally in 1^-dram doses twice daily for a cow, or in 20-grain doses 

 twice a day for a calf. Extirpation of all but a small section of the 

 swelling may be accomplished by a qualified veterinarian with good 

 results; but if it should be entirely removed, myxedema and death 

 follow. 



FIBROMA. 



Fibromas are tumors made up chiefly of connective tissue and are 

 usually confined to the skin and subcutaneous tissue. Indurative 

 fibromas of the skin appear as tumors of gelatinous connective tissue 

 or as firm white vascular connective tissue growths, which are more or 

 less sharply outlined, move readily over the underlying tissues in 

 company with the skin, and owe their origin to mechanical injuries, 

 perforating wounds, repeated abrasions, or the invasion of pus cocci 

 or botryomyces into the tissues. 



These tumors in cattle are frequently found upon the dewlap as 

 solid lumps, hard as stone to the touch, lying loosely between the 

 layers of skin, and gradually losing themselves in the softer tissues of 

 the neck above, or as smooth, hard tumors of glistening white sub- 

 stance with interlacing lines of softer tissue. They may also be found 

 located in the region of the knee or at the elbow. The skin over the 

 growths, in accordance with the originating cause, will be found 

 chafed, covered with scabs, or even ulcerated and accompanied by 

 collateral edema. 



These connective tissue tumors grow slowly, but reach enormous 

 size. They sometimes follow injuries to the region of the throat, and 

 form there as hard, firm growths, even reaching the size of a child's 

 head. 



A fibroma located upon the larynx is not an infrequent occurrence 

 in the ox. These tumors are always sharply outlined and have a 

 roughened surface. They may be differentiated from actinomycotic 

 tumors (see chapter on "Infectious diseases of cattle") in the same 

 location by their firm fibrous structure and by the absence of pus 

 from the interior. 



A tumor is sometimes met upon the muzzle of cattle, which assumes 

 a diameter equaling the width of the muzzle. It is a voluminous con- 

 nective tissue formation known by the name of " fibroma diffusum." 



Another form is sometimes observed upon the tongue. It grows 

 upon a broad, spreading base, becoming very hard. It is almost 

 lacking in blood vessels, although the few that are present are plainly 

 in view, and in consequence is poorly supplied with fluids. It is of 



