OSTEOMA. 



293 



in other situations, as in the testicle, parotid and mammary 

 glands, they are called enchondromata. They are liable to 

 calcification and retrograde changes. 



FIG. 120. 



FIG. 121, 



Myxoma (from the arm), showing the 

 characteristic branched anastomos- 

 ing cells, a few leukocytes, and one 

 or two spindle-cells. X 200 (Green). 



Hyaline chondroma. 

 (Green). 



X 200 



FIG. 122. 



Ivory exostosis 



ne, natural size (Ziegler). 



An osteoma is a tumor composed of bone, and may be of 

 either the dense or cancellons variety. It is said to be 

 heterologus when occurring in organs unconnected with bone, 



