Suppurative Arthritis. 431 



the remainder of the ulnar articular cartilage has at some 

 places disappeared, while at others it hangs loose. The margin 

 of the articular cartilage of the radius has heen lost, and the 

 cartilage on the cup-shaped depression is partly detached. The 

 hone from which the cartilage has disappeared is covered by 

 granulations — now altered by the spirit. G. C. 1251. 



7.15, Septic Inflammation of the Elbow-joint, probably 



after Iniury. — Upper end of a left ulna, olecranon wanting 

 — uiaeerated, illustrating the above. 



The articular surface is scarcely recognisable from its 

 toughness and irregularity. Much new bone has been thrown 

 out upon the inner and posterior aspects of the upper end and 

 for some way down the shaft. 



In this case septic inflammation has probably followed 

 compound fracture of the olecranon. B. C. i. M. 55. 



* KNEE-JOINT. 



2. Where the Inflammation has been caused hy Tuberculosis. 



a. Changes primarily in synovial membrane. 



7. 16. Tubercular Synovitis.— Glycerine and gelatine cast of 

 parts removed in an excision of the knee. 



The cast shows a mass of pulpy, oedematous, synovial 

 membrane round the patella, encroaching on the margin of the 

 cartilage. Similar characteristics are seen round the upper 

 end of the tibia, where the two semi-lunar cartilages were 

 covered by gelatinous material. On the femur the growth of 

 the vascular synovial membrane between the surface for the 

 patella and that for the tibia has separated the joint into tAvo, 

 one cavity above and one below the hgamentum mucosum and 

 the ligamentum alaria. G. C. 3806. 



Fresented by Charles "W. Cathcaet, F.R.C.S.E. 



* The knee-joint is taken first, because the various stages of the disease 

 are better illustrated in this Museum by the specimens of that joint than by 

 those of any other. 



