196 



THE PARASITISM OF 



liver, alimentary tract, skin, etc. — and I am glad to say that I am 

 able to corroborate most of the descriptions of the various writers. 

 The illustrations of this structure will be observed to be in 

 many cases from cancer of the breast. What holds true about 

 such typical growths as those of the mamma may be regarded 

 as being also applicable to most other varieties of cancer. 



Description of the Parasite. 



I. — In the Cell Body. — Taking, therefore, cancer of the breast 

 as an example, if careful microscopic examination is made, there 

 will be found lying, most commonly within the cell body, rounded 

 or oval structures, varying in most cases from 2/* to lo/^ in diameter, 

 having, when large, a very distinct capsule, and presenting a smaller 

 body of variable shape, situated, as a rule, towards the centre of 

 the capsule. From the capsule there may be seen passing towards 

 the centre numerous fine radial striations, and the capsule itself 

 occasionally seems to have similar markings. On the other hand, 

 passing outwards from the nucleus towards the periphery may be 

 observed processes of a somewhat different character; they are not 

 nearly so regular, and appear to be prolongations of the nucleus. 



Fig. 5 1 . — From cancer of the breast. Cells showing parasites contained 

 in the cell body magnified about 800. p, Parasite ; «, Nucleus. 



a ^ c 



Fig. 52. — Parasites enclosed within the cell body magnified about 800. 



These bodies occur usually one in a cell, but there may be 

 more ; and, in some cases, eight or ten of small size may be seen 



