74 



PROTOZOA AND DISEASE 



The Cystic Areas in the Bladder. The cysts at the neck of the 

 bladder appeared to the naked eye to be similar to those in the 

 kidney and in the ureter, but in the sections I made of them the 

 contents had escaped. Beneath the epithelium of the trigone and 

 around the dilated glands the microscope shows round- celled 

 (inflammatory) infiltration, more acute than that seen around the 

 ureteral cysts. 



FIG. 26. CYSTIC DISEASE OF THE URINARY TRACT. 



Part of the epithelial lining of a cyst and adjoining part of the contents of the 

 cyst : a, Fibrous layer ; b, epithelium ; c, intercorpuscular substance ; d, one 

 of the larger corpuscles. ( x 400 diameters.) 



What is the interpretation of this case ? The view that I first 

 took of the material in the cysts, namely that it is the result of 

 degeneration appears to have been reverted to of late. Brunn 1 has 

 shown that there are no glands in the normal ureter, but solid in- 

 dipping processes of epithelium (epithelial nests ; see Fig. 23) ; and 

 1 Brunn, Archi-v.fiir Microskop. Anat., 1893, p. 294. 



