THE MICROSCOPE IX PATHOLOGY. 239 



times called colloid cancers, when their structure may be 

 altogether different from cancer. 



Some forms of multilocular ovarian cysts depend, ac- 

 cording to Rindfleisch, upon a colloid degeneration of the 

 stroma of the ovary, wherein an epithelial proliferation 

 furnishes the foundations of the cysts. Such a case may 

 be termed a cystic colloid cancer of the ovary (Fig. 192). 



THE INFILTRATIONS. 



1. Amyloid Infiltration. 



This is known also as lardaceous or waxy degeneration 

 and vitreous swelling. It consists of the infiltration of 

 some sort of albuminate from the blood, which is charac- 

 terized by its becoming brownish-red or violet color by 

 treatment with iodine. It sometimes exhibits concentric 

 layers, like starch, which with the color phenomena led 

 Virchow to call it amyloid. 



The amyloid infiltrated cell (Fig. 193) is distinguished 

 from the normal by its greater circumference, together 



FIG 193 



Amyloid infiltrated liver-cells, a. Isolated cells. 6. A fragment of the liver-cell net- 

 work, in which the dividing lines of the individual cells are no longer visible. 1-300. 

 After RIXDFLEISCH. 



with a certain rounded irregularity. If several are in 

 contact they often coalesce into elongated lumps, in which 

 the individual elements counot be recognized. 



The walls of small arteries and capillaries are the first 

 to be attacked in all infiltrations, and this is especially 

 observable in amyloid infiltration. Fig. 194 represents 

 partial amyloid infiltration of a Malpighian tuft of the 

 kidney. The blue injection, and of course the blood dur- 



