452 Diseases of the Ge7iital Organs 



ovary lies behind the cystic duct. Sometimes when the 

 duct is closely convoluted and the convolutions held firmly 

 by adhesions, the mass may be mistaken for a very large 

 ovary. This error should constantly be avoided. The cystic 

 pavilion also is frequently mistaken for an ovarian cyst. 

 This is an unfortunate error because it leads to a false prog- 

 nosis. Cystic ovaries are not hopeless, but cystic distension 

 of the pavilion of the oviduct is beyond remedy. The veteri- 

 narian is also apt to err when the oviduct is free and, owing 

 to extensive degeneration, drops forward beneath the ovary, 

 as indicated in Fig. 160, where it is detected with great diffi- 

 culty. In one instance I diagnosed hydrosalpinx upon one 

 side, but failed to detect it upon the other side because the 

 oviduct was enormously enlarged and the mesosalpinx so 

 elongated that the oviduct dropped far downward and for- 

 ward beneath the gland. The result was that an incurably 

 sterile animal was retained in the herd for about a year. 



Hydrosalpinx is bilateral in approximately 90 per cent, of 

 cases. Since the prognosis is utterly hopeless, so far as the 

 involved tube is concerned, it follows that the prognosis of 

 hydrosalpinx in general is very bad. In some cases the dis- 

 ease may be confined to the oviduct, and the animal may 

 breed, and occasionally does, upon the sound side. In such 

 a case there is no call for interference. In other cases the 

 disease, especially when complicated with a large cystic 

 corpus luteum, may inhibit ovulation upon the sound side. 

 Relief may be had in such instances through amputation of 

 the diseased tube with the ovary. The veterinarian needs 

 to be very careful in making his diagnosis and to remember 

 that the condition is nearly always bilateral. Therefore it 

 is essential that he examine both sides with very great care. 

 If both ducts are involved, the case must be abandoned. The 

 operation for the removal of the tube and ovary is the same 

 as described in the preceding paragraphs. 



4. Cysts in the Mesosalpinx 



Occasionally one finds small cysts in the mesosalpinx. Some- 

 times they are located about the ampulla of the oviduct and are due 



