446 Diseases of Joints. 



rough from rarefaction. A considerable development of new 

 periosteal bone has taken place round the inner tuberosity. 



F. P. C. 764. 



7. 50. Invasion of Articular Surfaces from Tubercular 



Synovitis. — Upper ends of a right tibia and fibula. 



The articular surface of the tibia is greatly rarefied, and on 

 the inner side is somewhat eroded as well. F. P. C. 768. 



7. 51. Invasion of Articular Surfaces from Tubercular 



Synovitis. — Upper end of a right tibia. 



The outer and a small portion of the inner articular sur- 

 face remains, but the remainder of the upper surface of the 

 bone is rough from rarefaction and erosion. Some new bone 

 has been formed round the inner tuberosity. F. P. C. 777. 



7. 52. Invasion of Articular Surfaces from Tubercular 

 Synovitis. — The articular ends of a right femur and tibia — 

 showing extensive alterations at and near the articular surfaces. 

 Portions of the cartilaginous surface remain on the outer and 

 inner condyles of the femur, the remainder of the adjacent bone 

 being rarefied and eroded. The articular surfaces of the tibia 

 are more extensively eroded, especially on the outer side, where 

 there is a deep excavation. A crust of new periosteal bone has 

 formed round the articular ends of both bones, no doubt from a 

 sejDtic condition of the joint. The original texture of both 

 bones is much lightened. F. P. C. 778. 



Frcscntcd bij Professor James Russell. 



7. 53. Invasion of Articular Surfaces from Tubercular 

 Synovitis. — Upper end of a left tibia greatly altered by 

 tubercular disease. 



