490 DISEASES OF THE EAR 



enlargement will be found sensitive, hot and fluctuating. 

 When of older standing the acute symptoms will be absent 

 and some organization of tissue will be found around the 

 margins of the enlargement. 



Diagnosis. This is made on the location of the enlarge- 

 ment, the fluctuation and the absence of marked inflamma- 

 tory symptoms. 



Prognosis. Favorable in most cases. 



Treatment. Several modes of remedial procedure have 

 been used. The principles involved in the treatment in 

 order to be successful consist in the evacuation of the con- 

 tents, maintaining the separated tissues in contact so that 

 union can take place, and keeping the ear-flap quiet. This 

 is best accomplished perhaps by the following: Shave the 

 hair over the area and thoroughly disinfect the surface by 

 painting with iodin. Make the incision at the most pendent 

 portion of the enlargement and of sufficient length to permit 

 all the serum, blood clots and organized tissue to be removed 

 completely. Press out all the fluid and bring the separated 

 tissues in contact with the cartilage. Retain in contact by 

 suturing with interrupted sutures which pass through the 

 concha. The sutures should be placed so that the skin is 

 held in intimate contact with the cartilage at all points. A 

 dressing of iodoform should be applied and the ears band- 

 aged over the top of the head to ensure a quiet position and 

 sufficient external pressure to prevent any further collection 

 of serum. The dressing should be changed daily. In a week 

 or ten days the sutures may be removed and the bandage 

 discontinued. This method must be rather rigidly adhered 

 to if good results are expected. Other methods such as 

 removing the collection of material and injecting Lugol's 

 solution or tincture of iodin have been used. 



OTITIS EXTERNA. OTORRHEA. 



Involvement of the internal portion of the external ear 

 with various degrees of inflammation is very common in 

 dogs with long pendulous ears and in rabbits from parasitic 

 invasion. It is frequently unilateral, but in a number of 



