ROUND-CELLED SARCOMATA. 



295 



Sarcomata are liable to retrograde metamorphoses fatty 

 degeneration, caseation, liquefaction, and liberation. Accord- 



FIG. 123. 



Small round-celled sarcoma of the neck. Section only moderately magnified, show- 

 ing the extremely cellular character of the growth ; the great friability of the 

 tissue is owing to the minimal amount of intercellular substance it contains and 

 the intimate relations between the tissue of the tumor and the walls of rela- 

 tively large, thin-walled bloodvessels (Dunham). 



ing to the character of the predominant cells, several varieties 

 are described : 



Round-celled sarcomata have their prototype in the early 



FIG. 124. 





fc*^/ : A *A* 



Large round-celled sarcoma of the tongue, a, large round cell containing three 

 nuclei ; b, delicate fibrous stroma supporting the cells of the growth. At the 

 point b this stroma contains a collapsed capillary bloodvessel. The large round 

 cells are probably of endothelial origin. The growth occurred in a man aged 

 sixty -one years, and in the course of eight mouths had attained the size of a 

 hickory -nut (Dunham). 



