Symptums. 



873 



vessels, especially of tlie veins causes edematous swellings and 

 indications of heart weakness. The affection of the mesenteric 

 and other lymph glands of the abdominal cavity may result in 

 ascites or a chylus-thrombosis, when the enlarged lymph glands 

 may in large animals be palpated through the rectum, in small 

 animals through the abdominal wall. Exceptionally the thyroid 

 or the tli}mius glands may also appear enlarged. 



The enlargement of the spleen may be ascertained in horses 

 by rectal exploration, in small animals by palpation of the 

 abdomen. The considerably enlarged spleen of the ruminants 

 produces a dull sound running parallel with the posterior border 

 of the lungs, between the lungs and the rumen. Exceptionally 

 the left side of the abdomen may be distended downward and 

 outward by the enormously enlarged and heavy spleen. 



The sensitiveness of the bones to pressure, which might 

 be considered as an indication of a simultaneous affection of 



Fig. 155. Li/mphatic leukemia iniinoldhitch. o enlarged parotid gland; b,c,d,e 

 enlarged prescapular, inferior cervical, precrural, and poplietal lymph glands; f dis- 

 tension of the abdominal wall by fthe enlarged liver; g distension of the abdominal 

 wall by the enlarged spleen; h enlarged mammary gland. 



the bone marrow, was only reported by Wolff, who oljserved 

 in a calf sensitiveness in the region of the lower ribs and at- 

 tributed the same to leukemic hyperplasia of the bone marrow. 

 The disturbances in locomotion, which sometimes appear in the 

 course of leukemia, may also depend to a certain degree on 

 the painfulness of the bones. 



The enlargement of the liver may be recognized in small 

 animals from the increased area of dull sounds over the liver 

 region in the anterior half of Ijoth costal arches and still more 

 certainly by palpation of the epigastrium. In ruminants the 



