528 



LECTURE XX. 



Epithelioma cannot be distinguished from other tumours 

 by its elements' having the character of epithelium whilst 

 those of the others have it not. The tumour that 

 [Johannes] Miiller called Cholesteatoma, Cruveilhier, 

 tumeur pertte which I have translated Perlgeschwulst 

 [pearly tumour] this tumour has exactly the same epi- 



FIG. 141. 



Fig. 141. Solid mass of cancroid from a tumour of the underlip. Closely packed 

 layers of cells at the circumference, presenting all the characters of the rete Malpi- 

 ghii : in one of the processes, globules glistening like fat; in the middle of the body 

 of the growth, a horny, epidermoidal, hair-like structure, with onion-like globules 

 (pearls, globes epidermiques). 300 diameters. 



