THE REPRODUCTIVE ORGANS OF THE FEMALE. 



703 



of the broad ligament iii close connection with the tubes. Papillomata 

 are rare. 



Carcinoma of the tubes is usually, if not always, secondary to carci- 

 noma of the uterus or the ovaries. 



Cysts, usually of small size, sometimes pediculated and with thin 



FIG. 460. TcBERcrtors SALPINGITIS. 



The wall of a portion of the tube is converted into a dense mass of fibrous and necrotic tissue which is 



disintegrating. 



walls, are frequently seen in the peritoneal covering of the tubes or in 

 the fiuibrise. They are believed to be of embryonal origin. Combina- 

 tion cysts of the tubes and ovaries are of occasional occurrence retro- 

 ovarian cysts. 1 



Dilatation of the tubes, as above described, may convert them into 

 cyst-like structures. 



Extra-Uterine Pregnancy. 



TUBAL PREGNANCY. The impregnated ovum, in some way hindered from passing 

 into the uterus, may become fixed in the tube, and there develop. The villi of the 

 choriou grow into the mucous membrane of the tube, forming an incomplete placenta. 

 Rare cases are recorded in which the placenta was situated in the uterus while the 

 foetus was developed in the tube. The embryo and its membranes are developed until 

 they reach such a size that the tube surrounding them ruptures. This may occur in the 



'See Orthmann, Virchow's Arch., Bd. civ., p. 220, 1899, bibliography. 



