2^0 Diseases of the Genital Organs 



until old age. In the dog, the animal which suffers most 

 frequently from malignant tumors, the normal span of life 

 is but ten to twelve years, the briefest among domestic ani- 

 mals. 



Malignant new-growths may invade any portion of the 

 genital system, of either sex and in all species, and may 

 vary greatly in histologic type. 



Malignant tumors of the genital organs of bulls (as well 

 as of rams and he-goats) are exceedingly rare. I have not 

 observed a well defined clinical case and have no clearly 

 identified specimen in my collection. Possibly I am in error. 

 Young bulls very frequently have angry-looking, highly 

 vascular tumors on the glans penis which, examined histo- 

 logically, are found to be epithelial. They are commonly 

 described as carcinomata, but histologists are not wholly 

 agreed upon this point. So far as I have observed clinically, 

 they are usually not malign, however suggestive their ap- 

 pearance may be. When carefully excised, they show little 

 tendency to recur ; when neglected, they cause no daughter 

 tumors in the peri-penial lymph glands. 



The diagnosis and handling of malign tumors of the geni- 

 tal organs of bulls (and of rams and he-goats) must be 

 based upon general principles. When involving the glans 

 penis in a valuable bull, liberal amputation may be applied, 

 which, if timely, may eliminate the tumor and preserve the 

 procreative powers of the animal. The amputation should be 

 made under the technic described later for the amputation 

 of the penis of the stallion. 



At one time I doubted the ability of a bull to copulate 

 readily after the amputation of the glans penis. I attended 

 one famous sire which had suffered from a tumor on the 

 glans. Sections of the tumor had been examined by a 

 pathologist and pronounced carcinomatous. The glans had 

 been amputated. The stump refused to heal, and was in- 

 tensely inflamed and angry. After long and patient hand- 

 ling, the stump healed and the bull returned successfully to 

 breeding. 



