H2 Surgical Diseases and Surgery of the Dog 



ease is also rare and is distinguished from the former by marked 

 changes in the blood, but there is the same widespread enlargement 

 of lymphoid tissue and increase especially in the lymphocytes. In- 

 stances have been recorded by Siedamgrotzky, Leblanc and Nocard, 

 and Bouchet. Cadeac says the disease may be mistaken for tubercu- 

 losis. The changes taking place in the blood are highly characteris- 

 tic, the red corpuscles steadily, continuously, and rapidly decreasing 

 in number and suffering a diminution of hemoglobin, while the leu- 

 cocytes are greatly increased in number. The arteries sustain a 

 diffuse sclerosis. 



Symptoms and Diagnosis. Usually there is the same progressive 

 enlargement of the external lymphatic glands, but it is occasionally 

 absent. Conspicuous among the symptoms are: inappetence, inter- 

 mittent fever, conjunctival injection, anemia, progressive emacia- 

 tion, increased and throbbing cardiac action, tendency to hemorr- 

 hage, languor, and respiration normal at rest but accelerated during 

 movements. The proportion of white to red cells varies at different 

 stages of the disease. In Siedamgrotzky's observations it was as one 

 to fifteen to twenty to thirty, and in those of Leblanc and Nocard as 

 one to eighty-five. The normal is as one to five or six hundred. In 

 Bouchet's case there was abdominal pulsation which was thought to 

 be due to an aneurism of the aorta, but at the necropsy it was shown 

 to have proceeded from abnormal development of the splenic vessels. 



Treatment. As in the preceding form, the prognosis is hopeless, 

 death being inevitable within a few months, and seldom later than 

 one year. 



Lymphosarcoma. This type of growth differs from the pre- 

 ceding in that it infiltrates neighboring parts and involves the skin 

 and forms metastases. It has also an extremely rapid growth. The 

 most common seat of the disease is the lymphoid tissue of the neck 

 and groin, but it may also occur in the mesenteric glands (Semmer, 

 Hobday), the vagina (McFadyean) and the bronchial glands 

 (Johne). When arising in the neck it is most apt to be mistaken in 

 the early stages for goiter, and also for traumatic and tuberculous 

 abscesses, all of which are prone to form in these parts. 



Symptoms and Diagnosis. In external parts the first symptom 

 to be observed is a rapidly growing nodule or tumor, which, though 

 at first firm, elastic and painless, later on becomes tender and pain- 

 ful. The tumor soon gives rise to secondary growths in neighboring 



