THE STRUCTURE OF A ROUND-CELLED SARCOMA 



107 



picro - carmine, mounted in balsam, and examined with a low- 

 power objective focussed just above the surface, the middle part of 

 each intervascular area was marked out by a bright belt of light.' 

 These areas were thus distinguished by a high power of refracting 

 light, and in this they differed from the necrosed areas. _ Biondi- 

 z 



FIG. 41. SARCOMA OF TESTIS. (Camera drawing ; x 60 diameters.) 



i, Necrosed tissue ; 2, area occupied by highly-refracting cells ; 3, tumour-cells, 

 nuclei only indicated ; 4, strand of connective tissue. 



stained sections, examined under a low power, have the appearance 

 shown in Fig. 41. The areas last mentioned e.g., Fig. 41 ; 2 are 

 marked off from the rest of the tumour by a zone of large cells, 

 the nuclei of which are in a state of activity and stain well with 

 basic stains, and the cytoplasms stain richly with diffuse stains. 



