ROUND-CELL SARCOMATA. 



153 



structure in question as being really a cancerous degeneration of 

 tlic sarcoma (s. carcinomatodes). In my opinion, we are no 

 longer justified in regarding that cancerous type of structure 

 which is co-extensive with the clinical denotation of carcinoma, 

 as based exclusively upon the primordial opposition between 

 connective tissue and epithelium. ^^ Stroma " and ^' embedded 

 cells" may be produced in more ways than one, and " epithelioid " 

 is not synonymous with '^ epithelial "; though we may feel 

 puzzled to explain how it is that those cells which separate from 

 tlie parent soil in a more organic manner, slowly, and not sud- 

 denly like the corpuscular elements of pus, should invariably 

 exhibit this tendency towards a more epithelial type of develop- 

 ment. For there is just this distinction between genuine suppu- 

 ration and this simulacrum of it, that we cannot simply regard 

 the globular aggregations of cells as being wholly outside of the 

 nutrition of the body. Their continued existence without under- 

 going fatty degeneration affords sufficient proof of this. 



8. carcinomatodes occurs in the most diverse parts of the 

 intermediate apparatus of nutrition ; it is most frequent in the 

 marrow of bone, in the eye, in the subcutaneous tissue. A pecu- 

 liarly malignant variety, characterised by the pigmentation of 

 its cells, is known as 'pigmentanj cancer (s. alveolarc pigmcn- 



FiG. 47. 



Alveolar round-cell sarcoma, pigmented. &. An alveolus from 

 which its proper globe of round-cells has dropped out ; c. 

 Vessel, with pigmented endotheha ; d. Pigmented round- 

 cells ; e. Spindle-cells, forming stroma. 



