470 Diseases of Joints. 



The articular surface for the astragalus is rarefied andl 

 eroded. B. C. ii. M. 37. 



113. Tubercular Synovitis, involving* the Lower Ends of 

 the Tibia and Fibula. — Lower ends of a left tibia and fibula 

 — macerated, illustrating the above. 



The lower end of the fibula is enlarged by new periosteal 

 bone, and the tip of the malleolus is rough. The lower end of 

 the tibia is also enlarged, especially at the back and inner side. 

 The articular surface is rarefied and eroded. 



This probably has been a tubercular case turned septic. 



r. p. c. 801. 



114. Tubercular Synovitis, involving- the Lower Ends 

 of the Tibia and Fibula. — Lower ends of a right tibia and 

 fibula — macerated, illustrating the above. 



The patient had a scrofulous affection of the ankle-joint. 



The articular surface of the tibia in several places is bared 

 of its scale of smooth bone, exposing the cancellous tissue 

 beneath. Above the articular surface, in front and on the outer 

 side, there are rounded erosions as if from tubercular granulation 

 tissue. A crust of new bone extends up the back and outer 

 sides. The lower end of the fibula is much enlarged by a new 

 periosteal formation, the inner aspect of which is considerably 

 eroded. B. C. ii. M. 41. 



7.115. Tubercular Synovitis, involving- the Tibia and 



Astrag-alus. — Lower end of a left tibia and astragalus 

 — macerated, illustrating the above. 



The articular surface of the tibia is rarefied and irregular, 

 and a slight crust of new bone has been thrown out on the 

 back and inner sides of the lower end of the shaft. The 



