PRINCIPLES OF VETERINARY SURGERY 



579 



myxo-sarcomata. Neither should the mixed tumor devel- 

 oped at the extremity of divided nerves be regarded as 

 neuromata, as these cases are inflammatory growths that 

 are extremely sensitive, which should be extirpated. When 

 neurotomy has been performed under aseptic conditions 

 these growths do not develop. 



ANNOTATION. 



The so-called neuroma following plantar neurotomy is not always the 

 result of delayed healing of the wound from infective inflammation. These 

 growths are met in two distinct forms. One is always due to, or at least al- 



Fig. 86. 

 Chondroma of the Mammae of a Dog. 



ways follows the slow-healing, suppurating, granulating wound, and manifests 

 itself in the form of a sensitive cicatrix as soon as the wound eventually 

 heals. Histologically, it is scar tissue infiltrated with nerve elements that 

 emanate from the axis cylinders of the proximal end of the divided nerve. 

 It is, in fact, an effort of the organism to reunite the breach. This form of 

 the growth always shows at least some tendency to diminish in sensibility 

 with time. The second variety presents itself in the form of a small nodule 



