506 Diseases of Joints. 



outer side, "where a piece of new bone occupies the position 

 usually taken up by the head of the radius. There is an irregular 

 facet upon this piece of new bone which extends on to the 

 humerus, and must have been for articulation with the radius. 

 Lower down on the ulna is seen a small hollow facet, which 

 has evidently also been for the radius at the tubercle. Judging 

 from the position of the anterior ridge of the ulna, the bones 

 of the forearm have been fixed in pronation. 



The alternatives in deciding as to the nature of this con- 

 dition lay between the above and a congenital malformation 

 which indeed it in many ways resembles. B. C. 2. M. 51. 



JOINTS OF THE HAND. 



7. 198. Arthritis Deformans affecting- Inter-phalang-eal 



Joints. — -Plaster cast of a right hand, illustrating the above. 



There is comparatively little change in the thumb, but there 



is distinct enlargement at the inter-phalangeal joints of the 



fingers, especially between the last two phalanges of the middle 



and ring fingers, which are crooked as well. G. C. 3068. 



Presented Inj Bryax C. Wali.eii, M.D. 



For changes in the vertebrffi due to arthritis deformans, see series 

 illustrating the spine, 7. 2ri8 to 265. 



Changes due to Rheumatism. 

 7. 199. Rheumatic Chang-es in the Metacarpo-phalang-eal 



Joints. — Cast in glue and glycerine of the back of the right 

 hand of a young woman — illustrating the above. 



She had suffered from several attacks of acute rheumatism, leaving 

 alterations in several joiiits, of which this hand was perhaps the worst. 



There is enlargement at all the metacarpo-phalangeal 

 joints, and the fingers are flexed to the ulnar side, the thumb 

 being bent acutely forward. G. C. 2899. 



Presented by Chaules "\V. Cathcart, F.R.C.S.E. 



