74 



MICROSCOPICAL DIAGNOSIS. 



singly or many papillae may be affected, giving the growth a cauli- 

 flower appearance. The papillomata exhibit no tendency to return 

 after removal, yet in many ways they may become serious troubles. 

 They are liable to undergo ulceration, followed by hemorrhage, es- 

 pecially when situated in the blade er and intestine. Warts of the 

 skin, common warts and horny growths are varieties of this class, so 

 also are the condylomata and venereal warts. This growth will not 

 be mistaken for an epithelioma, for in the case of a papilloma, epithel- 

 ial cells are in their normal relations to the part, they are hdmolo- 

 gous, while in an epithelioma the cells are heterologous. 



TYPE OF OLAND CiSSUE. 



Adenoma, glandular tumor. In structure an adenoma is like 

 that tissue in which it is found, or from which it originated, for it 



5. Adcno-jibroma, from mammary gland. 



may, after a time, become completely separated from the old gland. 

 Its function will net be like the normal gland however. Indeed it 

 can be said to have no function whatever. The adenomata are very 

 difficult tumors to diagnose, being very liable to undergo the degen- 

 erations, especially the formation of cysts and the changing into 

 calcareous forms. They are frequently, perhaps most frequently, 



