no Surgical Diseases and Surgery of the Dog 



monly secondary to pulmonary tuberculosis through absorption 

 from the tuberculous matter coughed up into the pharynx. The 

 disease runs a course common to tuberculous inflammations with 

 caseation and eventual breaking down. 



Symptoms and Diagnosis. At first but little change is noticeable 

 in the glands, and they appear solid, mobile and freely defined. As 

 the disease progresses the inflammation extends to the periglandular 

 tissue and implicates the skin, the swelling then becoming diffuse, 

 soft, and fluctuating. Discharge takes place and a fistulous tract is 

 formed leading to the trachea or larynx. The external lesion pre- 

 sents a circular, oval, or irregular cavity with a thin, jagged border 

 denuded of hair, and gives vent to a greyish or sanguineous bacilli- 

 bearing purulent matter. 



Treatment. This lesion being in most cases secondary to pulmo- 

 nary tuberculosis, is rarely suitable for treatment and only when it 

 exists as a primary focus in superficial regions should curative meas- 

 ures be attempted, and then only if spread of infection can be guard- 

 ed against. If the case is presented in the early stages, before the 

 development of periadenitis, and there is undoubted evidence of 

 softening, the entire gland should be enucleated by blunt dissection, 

 without opening its capsule. If the disease process is found to have 

 extended and involved the surrounding tissues, the entire mass must 

 be carefully dissected out. And if discharge has already occurred, 

 the cavity should be thoroughly curetted, enlarged, and irrigated 

 daily with corrosive sublimate solution (i:iooo). 



NEOPLASMS. 



The primary growths affecting lymphatic glands are Lymphade- 

 noma and Lymphosarcoma. Both innocent and malignant types of 

 the former are seen but the latter is essentially malignant. Malig- 

 nant lymphadenoma occurs in two forms, both characterized by gen- 

 eral hyperplasia of the glands, but one of which is also associated 

 with increase of lymphocytes. Secondary growths in the lymphatics 

 are a feature of cancerous tumors, though they are less common in 

 sarcoma than in epithelioma and carcinoma. 



Benign Lymphadenoma. Lymphoma. This is a purely local 

 affection occuring as a single nodule or a series of nodules but lim-- 

 ited to one region of the body. Such growths occur usually second- 

 ary to catarrhal inflammations. The cause is unknown. They do 



