68 MICROSCOPICAL DIAGNOSIS. 



III. Type of embryonic tissue. The sarcomata. 



Spindle-celled sarcoma. 

 Round-celled sarcoma. 

 Myeloid sarcoma. 



IV. The carcinomata. 



Scirrhus. 



Encephaloid. 



Colloid. 



Epithelioma. 



FULLY DKVELOPKI) CONNECTIVE TISSL'F. 



Of the two kinds of corpuscles found in connective tissue, the 

 movable, or wandering kind, is the most important in this connec- 

 tion. In size, contractility, ability to wander, etc., they seem identi- 

 cal with the white blood corpuscles. In all probability they have 

 their origin in the blood. It is not known whether they cart pass 

 into the regular connective-tissue corpuscle or not. Neither is it 

 known in what channel they move. 



TVPK OF F1HROUS TISSTF. 



Kibroma, fibroid or connective tissue tumor. This tumor con- 

 sists of quite distinct fibres that are without any arrangement, and 

 that are separated only with difficulty. If the section be made 

 across a blood-vessel the fibres will be seen running in a circular 

 manner around it. Only a few cells will be found, and these are 

 most abundant in the neighborhood of blood-vessels. They are 

 usually of the spindle-shaped or stellate variety. Nuclei that take 

 the staining readily are seen distributed over the field. As a rule 

 t'.iere are but few blood-vessels, but it sometimes occurs that the 

 walls of the vessels have become firmly united with the structure of 

 t>.e tumor, hence if the growth be cut into or injured severely the 

 mouths of the vessels will not be able to contract and profuse 

 1, jmorrhage results. 



In size the fibromata vary from a very small circumference to 

 an immense growth. Their form is also varying. The fresh cut 

 surface is usually dry, only in the rapidly growing younger growths 

 when a serous or mucous fluid exudes. Arising from the skin they 

 are usually so c ter and less dense than those found in other parts, 

 and in this situation are usually single. They are generally limited 



