CLASSIFICATION, 411 



■or indifferent tissues, but in^whicli there may be — always abor- 

 tive — some attempts at higher development : — 



I Small spindle-celled sarcoma. 



Spindle- celled sarcoma, , ■{ .^ ° -^ " ** 



* Osteoid sarcoma. 



[^ Myeloid 



r Small round-celldd sarcoma. 

 Hound-celled sarcoma,' . ■< Alveolar sarcoma. 



V Melanotic sarcoma. 



Parasitic sarcoma, , . Actino-mycosis. 



2. — Ejpithdial Tumours, consisting not only of Mcsdblastic, hut of 

 Epiblastic and Hypohlastic elements in addition. 



On section these tumours are seen to consist of a dense basis 

 membrane — cancer stroma — built of reticulated bands and tra- 

 beculse, and containing within its areolae a substance of a softer 

 and different consistence, often in the form of a milky juice — 

 cancer juice. Tbey are classified as the carcinomata, which in- 

 clude the four following varieties, namely — 1. Scirrhous; 2. 

 Medullary or Encephaloid ; 3. Colloid ; and 4. Epithelioma. 



In addition to these two great groups we have cystic tumours, 

 found in various parts of the body, due to the dilatation of ob- 

 structed ducts, the embryonic forms of parasites, and to acci- 

 dental causes, as seen in the" endothelial cysts, found around 

 tendons, serous abscesses, &€» 



