A i'te7-io- Sclerosis. 359 



orifices, and offers great encouragement in the application of 

 this measure to aneurisms. The injection into the sac of tincture 

 of chloride of iron with firm compression to prevent motion of the 

 blood is another available resort. 



ARTERIO-SCI.EROSIS. 



Fibrous thickening of the arterial coats and calcification are 

 well known lesions in the posterior aorta particularly of the horse. 

 Commencing in congestion or degeneration which lessens the re- 

 sistance of the vascular walls, the condition tends to dilatation, and 

 if this is checked by compensatory thickening, the condition of 

 .sclerosis is induced. The combination of a slight fusiform dilata- 

 tion and fibrous or calcareous sclerosis is well known in the pos- 

 terior aorta of the horse. Unless it advances to marked aneuris- 

 mal dilatation the condition is not often recognized. If diagnosed, 

 rest and quieting of the circulation are especiall}^ indicated. 

 Should it occur in other parts of the body the symptoms would cor- 

 respond to the organ invaded. 



AXGEIOMA. CIRCOID ANEURISM. ANEURISM BY 

 ANASTOMOSIS. VENOUS TUMOR. NCEVUS. 



These are forms of dilatation and elongation of the network of 

 small arteries, or veins, and even of the intervening capillaries. 

 In man these constitute the unsightly red patches and swellings 

 that appear on the face and hands. In animals with dark skins 

 a-id hairy covering they can only be recognized by the .swelling, 

 the feeling as of a bag of worms when the hand is pa.ssed over it, 

 and by the rushing sound when auscultated. The trouble is us- 

 ually .subcutaneous and is essentially a surgical one. The most 

 promising treatment is by persistent pressure, by electric current 

 supplementing the pres.sure, by electro-puncture, and by injec- 

 tions of muriate of iron. When the noevus is not too extensive 

 a double thread drawn by a needle through beneath the tumor at 

 .short intervals, then cut and each point tied separatelj^ so as to 

 completely stop circulation is most effective. 



