3i6 Surgical Diseases and Surgery of the Dog 



Symptoms anl Diagnosis. Carcinoma is recognized by its 

 rapid growth, its hard consistence with occasional fluctuating or 

 ulcerating foci, its puckered surface of reddish blue color denuded 

 of hair, its intimate cohesion with the skin and its mobility from 

 underlying structures. 



Treatment. Growths of this nature may be removed as soon 

 as possible, together with a considerable area of the surrounding 

 skin. When early and free removal is practiced, recidivation need 

 not be feared. 



Sajcoma. Sarcoma arising either from the soft tissues or the 

 bones occurs about the legs. In the former case it may spring 

 from the skin proper or subcuticular tissues, and in the latter either 

 from the periosteum or the interior of the bone cavites (myelogenic 

 sarcoma). Myelogenic sarcoma usually develops, in the cancellous 

 tissue near the joints and the usual seat is the forearm or shoulder 

 and lower extremity of the femur. The growth gradually causes 

 expansion and distortion of the osseous shell, which, however, is 

 continually being reformed from the greatly thickened periosteum, 

 so that there ultimately results a local deformity of enormous di- 

 mensions. Finally, it breaks down and discharges by fistulous 

 tract. 



It may be remarked here that owing to the fact that myeloid 

 sarcoma (of the center of the bone) is of distinctly low malignancy 

 and very rarely forms secondary growths at a distance, the tendency 

 now is to speak of this as "Myeloma" and separate it from the 

 sarcomas proper. 



Symptoms and Diagnosis. Sarcoma arising from the soft tis- 

 sues is characterized by very rapid growth, soft consistence and 

 tendency to ulcerate. It is either intimately blended with the skin, 

 when it is usually mobile from the subcutaneous structures, or lies 

 subcutaneously when it is sessile. Periosteal and Myelogenic sar- 

 coma is recognized by the local deformity and rapid increase in size 

 Df the enlargement. All the deeper forms are generally accom- 

 panied with lameness. 



Treatment. Only the more superficial forms are eradicable 

 by operative measures, though there are a few instances on record 

 of treatment of bone sarcomata of the lower extremities by ampu- 

 tation of the member above the seat of disease. 



