REACTIVITY OF MALIGNANT NEOPLASMS 



Fig. 19. Histologic appearance of normal t^vehe day old sarcoma iSo. High jjower 

 view showing immalurit\ of cells and numerous mitoses. X 460. (Shwart/man. 

 1936") 



ably because ot the short life span of inoculated mice. The aver- 

 age size of the tumor is 1 cm. in diameter at the end of the second 

 'week. From this time on, the tumor gro^vs \'ery rapidly tmtil it 

 may reach the size of 4-5 cm. in diameter, about one month to 

 six \veeks after inoctdation. No iluctuations in growth energy 

 and no seasonal influence on the or()\vth of the tiunor ha\e been 



