LECTURE XX. 



APRIL 27, 1858. 

 FORM AND NATURE OF PATHOLOGICAL NEW-FORMATIONS. 



Nomenclature and classification of pathological new-formations Consistence as a 

 principle of division Comparison with individual parts of the body Histolo- 

 gical division Apparent heterology of tubercle, colloid, etc. 



Difference of form and nature : Colloid, Epithelioma, Papillary tumour, Tubercle. 



Papillary tumours : simple (condylomata, papillomata) and specific (villous cancer 

 and cauliflower-tumour). 



Tubercle : infiltration and granulation Inflammatory origin of tubercle Its origin 

 from connective tissue Miliary granules, and solitary masses The cheesy 

 metamorphosis. 



Colloid : myxoma Collonema Mucous or gelatinou s cancer. 



Physiological types of heterologous new-formations : lymphoid nature of tubercle, 

 haematoid of pus, epithelioid of cancer, cancroid, pearly and dermoid tumours, 

 and connective-tissue-like of sarcoma Infectiousness according to- the amount 

 of juice. 



Comparison between pathological new-formations in animals and vegetables Con- 

 clusion. 



IF, gentlemen, we prosecute the train of thought which 

 we have pursued in the last lectures, it seems to me that 

 the question which you will perhaps next ask me, is, at 

 what point the differentiation of new-formations really 

 begins. You will remember that, according to our views 

 the great majority of new-formations have their origin in 

 connective tissue or parts equivalent to connective tissue, 

 and that the first rudiments of aU new-formations are 

 nearly of the same nature, and that in particular the 

 division of the nuclei, their multiplication, and the final 



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