Benign Tumors of the Female Genitalia 



261 



location, anterior to the apex of the uterine cornu When 

 large ovarian tumors cause incarceration colic, the diagno- 

 sis is not always easy. If the incarceration involves the pel- 

 vic portion of the rectum, the veterinarian faces a rather 

 delicate problem in diagnosis. He can not palpate the uterus 

 and ovaries 'per vaginam, and he may find palpation per 

 rectum barred by incarceration. The principal question 

 lies betM^een a stricture of the rectum and a mechanical con- 

 striction investing the gut from within the pelvic cavity. 

 The investment of the rectum by means of the peduncle of 



Fig. 74 — Schematic illustration of method of incarceration. 



/, Intestine ; Jtf, mesentery ; O, ovary ; T, parovarian tumor or cyst ; 



P, pedicle of tumor ; J?, rectum ; J?', rectum posterior 



to point of strangulation. 



an ovarian or other tumor produces no changes in the walls 

 of the rectum such as those encountered in actual stricture. 

 There is no. inflammation, no sclerosis, and no edema of the 

 rectal walls, if they have not been neglected nor tampered 

 with. The hand may pass freely along the rectum until it 

 comes suddenly upon the constricted portion, when further 

 progress is more or less completely barred. In the incarcera- 

 tion colic caused by the parovarian cyst illustrated in Figs. 

 72, 73 and 74, the clinical features were identical with those 

 due to ovarian incarceration of the intestine. I found that 

 anteriorly a finger could be passed through the constriction 

 into the free portion. The constriction was necessarily lim- 

 ited in area to the diameter of the peduncle of the cyst. The 



