252 



The rigs. 58. 50. CO and HI represent sections througli 

 such cultures ol' the I'eyion R o u s"s sarcoma after a 

 couple of month's cultivation. Shortly before the fixation 

 and sectioning, a new piece of muscular tissue was added, and 

 now it can be seen to be already invaded by sarcoma cells. 

 In fig. 58 a part of the muscle formerly added, can be seen 







Fig. 60. 



Represents a section through a culture of the Rous sarcome after a couple of 

 month's cultivation. An infiltration of the muscle fragment can be seen. 



infiltrated and overfilled with Ihe typical polymorphous 

 cells, characteristic for this lumor. The arrangement of the 

 cells, bundles of fibroblast cells, crossing the field in several 

 directions gives a picture which can l)e diagnosed as sarcoma 

 The cells seem to grow abundantly and multiply rapidly 

 in the muscular tissue and finally substitute the muscle 

 bundles. 



