460 Diseases of Joints. 



the under part of the trochlear surface. The back of each condyle 

 has been anchylosed to the corresponding tuberosity of the 

 tibia ; but the tibia is partially dislocated backwards and 

 rotated outwards. In this specimen, however, the rotation has 

 chiefly occurred by the bending outwards of the shaft of the 

 femur, just above the condyles, possibly from twisting round a 

 crutch. The bones are light and greasy. F. P. C. 817. 



Presented by Professor James Russell. 



7. 87. Anchylosis after Tubercular Arthritis.— Bones of a 



left knee-joint — macerated, illustrating the above. 



The joint has been in the semi-flexed position. The 

 patella is united by bone to the lower part of the outer condyle. 

 The inner condyle is also firmly united by bone to the inner 

 tuberosity of the tibia, while the back of the outer condyle has 

 been anchylosed by fibrous tissue to the front of the outer 

 tuberosity of the tibia. The tibia has been dislocated back- 

 ■\vards and rotated outwards upon the articulation between the 

 inner tuberosity and the inner condyle. The bones are better 

 developed and less greasy than in the three foregoing specimens. 



W. C. H. 47. 



88. Anchylosis after Tubercular Arthritis.— Bones of a left 



knee-joint — macerated, illustrating the above. 



The joint has been only slightly flexed. The patella is 

 united by bone to the outer condyle. The inner condyle is 

 united by bone to the inner tuberosity. 



In this, as in the previous specimen, the tibia is dislocated 

 backwards and rotated outwards round the inner part of the 

 articulation. There is a tendency of the femur and tibia to be 

 curved backwards above and below the joint, thus partially 

 undoing the flexion there. The bones are light and greasy. 



F. P. C. 816. 

 Presented by Professor James Russell. 



