194 VETERINARY PATHOLOGY. 



fused with degenerative or infective tissue changes which are 

 observed in functional or inflammatory fibrous formation. Meta- 

 plasia is usually concerned in the conversion of one variety of a 

 primary tissue into another variety of the same tissue as fibrous 

 tissue into bone and occurs in physiologic processes as well as 

 in disease. 



Metaplasia occurs in scars, the conditions consisting of the 

 replacement of fibrous tissue by osseous tissue. This type of 

 metaplasia is also evident in bone spavin, ringbone, sidebone, as 

 well as in scars resulting from fistulous withers, poll evil, etc, 

 Metaplastic osseous formation was recently noted in the omen- 

 tum of a sheep. The conversion of lymphoid tissue into adi- 

 pose tissue is metaplasia. The replacement or substitution oi 

 sqnamus epithelium for cubic or columnar epithelium repre- 

 sents a type of metaplasia. 



Metaplasia is of little significance except as a pathologic con- 

 dition. 



