THE MICROSCOPE IN PATHOLOGY. 281 



the spindle-celled tissue of recent cicatrices ; 6, large-celled 

 spindle-celled sarcomata, in which the cells attain an ex- 

 cessive development (Fig. 2-8;; and c, the pigmentary sar- 

 comata. 



FIG. 227. 



Spindle-celled scarcoma. Gaping vascular luruina. The cell lines are divided partly 

 longitudinally, partly transversely. 1-300. After KLSDFLEISCH. 



(3.) The giant-celled sarcomata, called also myelo-plastic 

 and myeloid sarcomas, contain large cells, with numerous 

 nuclei and nucleoli in a finely granular substance (Fig. 

 229). These occur usually on bones. 



Sarcomata are rarely found in internal organs. They 

 usually arise from common connective tissue, and the 

 influence of locality on them is obvious. Thus on the 

 surface of bone we have osteoid sarcomata, pigmented 

 sarcomas in the skin and choroid, soft and gelatinous 

 sarcomata in the glands, etc. Complete cure sometimes 

 follows extirpation, but at other times there is a recur- 

 rence in the cicatrix, giving rise to the term recurring 

 fibroid. Like other tumors they may inflame or become 

 atrophied, or fatty metamorphosis, calcification, etc., may 

 occur in them. 



2. Syj)hiloma. G-umma-syphiliticum. Gummy tumor. 



