32 THE TONER LECTURES. 



feriiig from an ovarian cyst, the removal of which was at- 

 tempted in October, 1871. (Surgical Section, Army Medical 

 Museum, No. 5944.) On opening the abdominal cavity a 

 medullary cancer of the ovary, of brain-like consistency, was 

 discovered and partially removed. The patient died shortly 

 after. 



Sections showed the growth to be made up of a net-work of 

 large cancer cylinders held together by a comparatively scanty 

 connective tissue ; many of them were dilated at intervals so 

 as to resemble irregularly oval cysts. They were lined by a 

 layer of polygonal cells which might be compared to an epithe- 

 lium, and their cavities were filled with an albuminous fluid 

 from which the action of the alcohol used to harden the prepa- 

 ration condensed spherical, somewhat 3'ellowish, semi-trans- 

 parent bodies of obscure nature. (Three photographs, Nos. 

 67 to G9, shown.) 



Now if in such a growth as this the cystic dilatations, and 

 the epithelium-like lining of the cancer cylinders suggest the 

 idea that they might be transformed Graafian follicles, I must 

 remind jou of the other ovarian cancer of which I have alreadj^ 

 shown you a representation, in which the small size of the nu- 

 cleated cylinders and the absence of any lumen would seem to 

 exclude such a possibility. 



I feel that I should be trespassing upon your patience if I 

 were to continue to raultipl}- individual examples, but I ought 

 not to forget to remind you that the cells of the cancer C}^!- 

 inders may undergo the most varied transformations and de- 

 generations, which aid in making up the complex picture pre- 

 sented by cancerous growths as they actually occur. The cells 

 ma}' increase in size till often, in mammary cancer for example, 

 they rival the larger forms which occur in cancers of tlie skin. 

 It is from portions of such tumors, in which the cells of the 

 cancer cylinders have grown, till on section the cylinders ap- 

 pear like irregular alveoli of variable size filled with large ir- 



