296 



VETERINARY PATHOLOGY. 



tortuous arteries. This variety of hemangiomata is not common 

 in the domestic animals. 



Lymphangiomata are tumors composed of newly-formed lym- 

 phatic vessels. These tumors are not common ; in fact, only one 







^f /^ ^ J r ( ^ ''•''' (\Lr ■#-. i J '^ 



t'i 



V J ,,1 s> *^®^ ^ , 



Fig. 151. — Section of Hemangioma H.vpertrophicum, sliowing an increase in 

 the number of tlie vessels and an liypertropliy of their walls. 



or two cases have been reported by veterinarians. The tumors 

 may be conveniently divided into capillary and cavernous. 



Angiomata are usually benign tumors, although by rupture 

 they may produce fatal hemorrhage or lymphorrhage. 



MYOMA. 



Mvomata are muscle tumors. They are divided into two 

 classes: 1. Leiomyomata or the smooth muscle tumors. 2. 

 Rhabdomyomata or the striated voluntary muscle tumors. My- 

 omata, found occasionally in the human, are rare in the lower 

 animals. 



