408 



DISEASES OF THE URINARY ORGANS. 



On section, the swollen and rounded appearance of the 

 kidney is seen to be due mainly to a marked increase in the 

 thickness of the cortex. The cortex may be intensely hyper- 



FIG. 191. 



Parenchymatous nephritis, a, cross-section of a convoluted tubule of the kidney, 

 the lining epithelium of which is the seat of albuminoid degeneration. The 

 cells are swollen and their bodies filled with abnormally coarse granules. The 

 cells to the left are so far disintegrated that the nuclei have lost most of their 

 chromatin. Such cells cannot recover. The cells to the right are less pro- 

 foundly altered and their nuclei retain sufficient chromatin to stain slightly. 

 These cells might, perhaps, recover. Other convoluted tubules similarly 

 affected are represented in oblique section, b, tubule with low, unaffected 

 epithelium, the nuclei of which stain deeply ; c, round-cell infiltration of the 

 interstitial tissue in the neighborhood of a Malpighian body, the edge of which 

 is just above the line c. Section stained with hsematoxylin and eosin. 



semic, with here and there small punctiform hemorrhages, the 

 distended glomeruli standing out prominently as dark red 

 points ; or mottled in appearance by yellow patches of fatty 



