TUMOUR, INFLAMMATORY NEW GROWTH, ETC. 73 



Myxoma is the name given to a soft, fluctuating tumour 

 composed of connective-tissue cells embedded in a mucoid 

 groundwork. It may occur anywhere where connective 

 tissue exists normally. 



A myoma, or muscle tumour, is so called because in struc- 

 ture it resembles non-striated muscular tissue. It is most 

 commonly met with in connection with the subcutaneous 

 tissues and the uterus (see p. 302). 



Osteomata are formed of bone tissue, and are met with 

 in connection with bone or cartilage. Occasionally, in the 

 bitch and cat, they are found in the mammary gland. 



The psammoma is very rarely met with in the dog and 

 cat, and occurs only in the brain. Its presence can only be 

 suspected by the symptoms shown by the patient, but its 

 certain diagnosis can only be made after a post-mortem 



Fig. 45. — Blunt Tumour Hook or Retractor. 



examination. It is located in such a situation that its 

 successful removal by surgical procedure is impossible. 



Papillomata, or warts, are a variety of tumour commonly 

 met with in the dog and cat. They may occur almost any- 

 where, and are particularly met with on the skin, in the 

 mouth, and even in the trachea. The mouth and tongue 

 of the dog have been known to be completely covered with 

 them, so closely are they sometimes packed together (see 

 Fig. 100). In this situation they are contagious, and may 

 even interfere with the act of feeding (see p. 130). 



In addition to the above tumours, there are those which 

 partake of the nature of more than one class ; for example, 

 we may get an osteo-sarcoma, osteo-chondroma, adeno- 

 carcinoma, etc. 



Treatment.— In the case of malignant growths, the benefit 



