THE REPRODUCTIVE ORGANS OF THE FEMALE. 693 



Carcinoma, usually of the medullary variety, may occur as a primary 

 tumor of the ovary. It may be due to a continuous extension from 

 neighboring organs, or more rarely it is of metastatic origin. Although 

 the medullary carcinomata are the most common, scirrhous, melanotic, 

 and gelatinous forms sometimes occur. Some types of carcinoma stand 

 in very close relation with certain of the cystic adenomata (see below). 



Adenoma (Cystic Adenoma ; Compound Ovarian Cyst). These growths, 

 which may occur in one or both ovaries, form one of the most common 

 and important classes of ovarian tumors. They probably originate in 

 the gland epithelium of the ovary either before or after the formation of 

 the Graafian follicles. Some of their most noteworthy and important 

 features depend upon their tendency to the formation of cysts. It should 



FIG. 448. CYSTADKNOMA OF THK OVARY. 

 Showing large cysts, with a glandular mass within one of the cysts. 



