450 Diseases of Joints. 



Synovitis. — Patella, showing, along with considerable rarefac- 

 tion of the articular surface, some new bone formation on 

 the anterior surface. G. C. 1175. 



Presented by Professor James Russell. 



7. 62. Invasion of Articular Surfaces from Tubercular 



Synovitis. — Patella, showing rarefaction of the articular surface, 

 with some development of new bone on the anterior surface 

 and lightening of the original bone texture. G. C. 1175. 



Presented by Professor James Russell. 



7. 63. Tubercular Synovitis with Abscess.— Plaster cast 



illustrating the above. 



The cast shows a general globular swelling of the joint, 

 with a projection at one spot which must have been due to an 

 abscess. The adjacent parts of the limb have been atrophied. 



F. P. C. 2889. 



b. Changes primarily in bone, or apparently so. 



7. 64. Tubercular Arthritis beg-inning- in the Femur.— 



Sections of the knee-joint of a child — injected and in spirit. 

 One-half has had a slice removed from the front, to display 

 more completely the interior of the epiphyses, and the articular 

 ends of the other half have been wrenched apart. 



The interior of the joint has been occupied by jras and 

 curdy matter, and the cartilaginous surfaces have been irregu- 

 larly eroded. Caseous centres may be seen on the cross section 

 of the lower epiphysis of the femur. The epiphysis of the tibia 

 is apparently intact. 



This appears to have been a case where the disease has 

 begun in the bone, for the synovial membrane has not been 

 much affected. G. C. 3192. 



Presented by A. G. Miller, F.R.C.S.E. 



