Nos. 620-621] CANCER'S PLACE IN BIOLOGY 



407 



(Less malignant) (Pseudo-textocytes). (More malignant). 



Briefly, in conclusion, the writer makes the following 

 generalizations from his experience in his studies of can- 

 cer's place in general biology: 



divided their labors and become specialized and differentiated to f< 



when the tissues are partially destroyed by antagonistic forces. 



3. In many animal and vegetable tissues the regenerative cells respi 

 to tissue-destruction in three degrees, i. e., hypertrophy, hyperplasia i 



4. During hyperplasia with or without migration the cells sometimes 

 tempt to differentiate. 



5. Limited hyperplasia with complete differentiation produces tissue 



issues plus migration without complete differentiation. 

 7. Regeneration (hyperplasia) without differentiation is a cytotypic pre 



8. Regeneration (hyperplasia) with differential 



9. Cancer is a cytotypic instead of a textotypie 



i sometimes fatal to the 



MacCartv, W. 



XII, 189-198. 



ion Jour. Med. and Surg., 



ally and postnatally and 

 ig the prenatal cells of 

 jostnatal cells textoblasts. 



