464 Diseases of Joints. 



the acetabulum a few flakes of cartilage remain, but the most 

 of the articular surface shows bare bone. The synovial mem- 

 brane round the acetabulum is thickened, and is shreddy on 

 the surface. G. C. 172. 



7. 98. Tuberculap (?) Synovitis, involving- the Bone.— Part of 



a left innominate bone and thigh bone — macerated, illustrating 

 the above. 



From a patient who died of hip-joint disease. 



" The capsular ligament was much relaxed, the ligamentum 

 teres was entirely destroyed, the cartilages much eroded, the 

 acetabulum nearly filled with coagulable lymph, and the head 

 of the femur dislodged." 



The articular surface of the acetabulum is rarefied and rough, 

 and the normal smooth layers which lie below the cartilage 

 remains only in some places. On the upper and lateral parts of 

 the head of the femur the bone is similarly rarefied, and 

 also partially absorbed at the front. Above and behind the 

 attachment of the ligamentum teres there is some eburnation of 

 the surface, such as is seen in arthritis deformans. Eound the 

 acetabulum there has been a considerable deposit of new bone. 

 A small deposit of new periosteal bone is seen on the under side 

 of the neck of the femur. 



The eburnation on the head of the femur points to 

 arthritis deformans, while the new growth round the acetabulum 

 resembles that due to septic irritation ; the rarefaction and 

 "flakesof coagulable lymph" may have been tubercular. Possibly, 

 therefore, arthritis deformans has been followed by tuberculosis* 

 and this has led to an abscess, which, after bursting, has become 

 septic. B. C. II. M. 7. 



7. 99. Tuberculap Synovitis, involving: the Acetabulum.— 



Right of innominatum — macerated, illustrating the above. 



