Benign Tumors of the Female Genitalia 257 



Dermoid cysts of the testicle occur now and then, contain- 

 ing bones, teeth, hair, or all three (see Fig. 70). Such tes- 

 ticles occur almost wholly in the horse, are generally crypt- 

 orchid, and are beyond remedy as to breeding, but should 

 be removed in order to eliminate the sex desire, frequently 

 perverted, which they cause. If the other testicle is sound, 

 the animal is fertile. No data exist to indicate that such an 

 aberration in development does or does not tend to recur in 

 the progeny of such a male, but, since arrests in develop- 

 ment generally tend to be transmitted to the offspring, it is 

 well to be on guard and view with distrust the use, as a sire, 

 of an animal so affected. Cysts of the testicle, epididymis, 

 and spermatic cord are recorded. 



2. Benign Tumors of the Female Genitalia 



Benign tumors of the ovaries proper are exceedingly 

 rare. I have no well-marked example in my collection, al- 

 though they are recorded in great variety. Since, when 

 they involve one ovary only, fertility is unimpaired, they 

 are not sought in connection with sterility. They are but 

 rarely of such volume as to change the appearance of the 

 animal. Most frequently they attract clinical attention by 

 causing incarceration colic, the tumor having fallen over an 

 intestine so that its long peduncle becomes wrapped about it 

 in a manner to prevent the free passage of feces along the 

 canal. Generally the bodies leading to such incarceration 

 colic are not true tumors. Most frequently they are ovarian 

 (Fig 71) or par-ovarian (Figs. 72-74) cysts of large size. 

 There are at least four distinct types of ovarian cysts in 

 cows, and probably an equal number in other species : 



1. There are generally present a large number of small 

 cysts, from 1/20 to 1/10 of an inch, apparently atretic folli- 

 cles. They have no known relation to breeding efficiency or 

 to the general well-being of the animal. 



2. The moderate-sized cysts of nymphomania, apparently 

 resulting from the death of the ovum, as a result of ovarian 

 infection associated with an increased volume of follicular 

 fluid. 



