368 Tumors. 



(spleen, lymph glands, bone marrow), it is known as a lympho- 

 sarcoma. 



The spindle cell sarcoiiia (sarcoma fnsiccUidarc) also presents 

 both small and large cellular elements and originates from ordinary 

 connective tissue. Its spindle shaped, more or less elongated cells 

 contain one or more round to fusiform nuclei, are placed parallel 

 to each other, arranged along the bloodvessels in bundles inter- 

 twining in different directions, and are comparable to the fibro- 



id u- 



Fig. 104. 



(jlant cell sarcoma, from human jaw : a, capillary blood channel : h, giant cell ; 

 c, sarcomatous cells, In this specimen of spindle type. 



blasts of granulation tissue. The bloodvessels are also of em- 

 bryonic type, persisting as simple endothelial channels, often distin- 

 guishable from lymph spaces merely by the fact that they contain 

 red blood cells. Where the intercellular fibrillar substance is more 

 prominently developed the spindle cell sarcoma becomes a fibro- 

 sarcoma. 



The giant cell sarcoma (sarcoma gigantocelhdarc). The pres- 

 ence of numerous giant cells in a connective tissue tumor, always 

 a striking feature of the microscopic sections, gives origin to the 

 term giant cell sarcoma. The large polynucleated cells thus known 



