INFECTIOUS DISEASES 



215 



wounds. The lesions consist of tumefaction, redness, 

 and sensitiveness, followed by necrosis. The necrotic 

 tissue may become desiccated and slough, or it may be 

 converted into a mushy mass. The erosion of the vulva 

 may destroy the vulvar tissue and even the anal tissue. 

 Dense masses of fibrous tissue usually develop in the 



^*; 



~^-*f r 



Fig. 25. FAT NECROSIS (Omentum). 

 A. Normal fat. B. areas of necrosis. 



perinecrotic zone, which later cicatrizes and produces 

 various distortions of the vulvo-anal structures. 



Infection of the prepuce may gam entrance through 

 abrasions produced by inflammation that has resulted 

 from irritation from urine, screw worms, or similar 

 causes. Infection may also be favored by traumatic 

 injuries of various kinds. The lesions are of the same 



