NECROSIS OF THE TURBINATED BONES. 



321 



(F) NECROSIS OF THE TURBINATED BONES. 

 After Jessen's description of a peculiar disease of the turbinated 

 bones of the horse, accompanied by chronic thickening, Stockfleth 

 and others published descriptions of similar cases. The condition 

 is not common in North Germany, and usually appears after strangles, 

 while a few cases of Moller's have been caused by disease of the 

 upper molars. Sand, on making the post-mortem examination of 

 an old horse which had shown an offensive nasal discharge, found 

 the mucous membrane was thickened, and the surface of the ethmoid 

 cells necrotic. The bony plates had broken down, forming a grey, 

 grumous material. Moller has seen two cases caused by disease of 

 the upper molars, and Frohner published three of a similar kind. 



Fig. 318. — Necrosis of the turbinated bones. 



For a very full description of this condition see Cadiot and Dollar's 

 " Clinical Veterinary Medicine and Surgery." 



Sand describes a peculiar disease of the turbinated and neighbouring 

 bones which he terms mucoid degeneration (schleim-degeneration). The 

 disease was seen oftenest in foals, and was distinguished by dyspnoea, 

 swelling of the bones of the face, and a muco-serous discharge. The post- 

 mortem showed the bones of the face to be much thinned, partly perforated, 

 and the sinuses of the head greatly dilated. The remains of bone structure 

 in the turbinated bones could only be recognised microscopically ; the 

 latter appearing to be almost transformed into a mucoid tissue. The 

 walls of the superior maxillary and frontal sinuses showed the same changes, 

 and the cavities themselves were greatly increased in size. Their contents 

 were sometimes purulent, sometimes muco-serous. 



The early symptoms consist of a stinking discharge from one 

 nostril, snoring breathing, and diminution in the stream of air of 

 the affected side. At a later stage the nasal bones become swollen, 

 and not unfrequently the thickening in the turbinated bone can be 



