292 



THE MICROSCOPIST. 



Scirrhus is generally met with in the mammse and in 

 the alimentary canal. It is quite hard previous to pass- 

 ing into the ulcerative stage, and on section the tumor 

 exhibits a grayish-white glistening surface with occasion- 

 ally fibrous interlacing bands. Scraping the juice from 

 such a tumor may suffice for a cursory microscopic exami- 

 nation of its cells. 



FIG. 233. 



Carcinoma simplex mammae, a. Development of nests of cancer-cells, b. Fully formed 

 carcinoma tissue, e. Commencing cicatrization ; at the same time a representation of 

 the relations of stronia and cells in scirrhus. d. Cancer cicatrix. 1-300. After RIND- 

 FLEISCH. 



(2.) Encephaloid. Medullary or acute cancer differs from 

 scirrhus in the rapidity of its growth, and consequent 

 softness of its structure. It is generally so soft as to be 

 brainlike, hence the term encephaloid. There are, how- 

 ever, all intermediate stages of hardness in cancers be- 

 tween the extremes of scirrhus and encephaloid. In the 

 latter epithelial growth is very rapid, and the proportion 

 of stroma small, while the abundance and softness of the 

 bloodvessels produces frequent haemorrhages. 



Encephaloid occurs generally in the internal organs as 

 a secondary growth after extirpation of a cancerous 



