Arthritis Deformans of Shoulder -joint. 501 



7. 188. Advanced Arthritis Deformans, with Alteration of 



the Articular Surfaces. — Eight humerus and scapula of an 

 elderly person — macerated, illustrating the above. 



The articular surfaces are both flattened out, and the 

 globular character of the head of the humerus has been quite 

 lost. Eound the articular margins of both bones there are 

 numerous irregular outgrowths of bone. The bicipital groove 

 is lost, there being only a shallow depression at the upper end 

 to mark its former site. The shaft of the humerus is curved 

 outwards at the attachment of the deltoid. The upper part of 

 the greater tuberosity has been in contact with the acromion 

 process, and the bony outgrowths on the glenoid cavity reach to 

 the top of the coracoid process. There is little or no alteration 

 on the lower articular surface of the humerus. There must 

 have been considerable shortening of this arm. 



These appearances of the shoulder-joint are such as might 

 have been artificially produced had the bones been softened to 

 a putty-like consistence and then pressed together. 



G. C. 1193. a. 



Presented hij Professor James Russell. 



7. 189. Advanced Arthritis Deformans, with Alterations in 

 the Shaft of the Humerus. — Right humerus and scapula 

 — macerated, illustrating the above. 



As in the previous preparation, the head and glenoid 

 cavities have apparently been compressed and flattened against 

 one another, and irregular masses of new bone formed round the 

 articular surfaces fit more or less accurately into one another. 

 The greater tuberosity, in this specimen also, reaches to 

 the acromion process, and the upper part of the shaft of 

 the humerus is very much altered. There is much irregular 

 thickening at the level of the attachment of the deltoid, and at 

 the lower part of the usual position of the bicipital groove there 

 is an aperture leading into the bone which communicatea inter- 

 nally with the lower edge of the altered articular surface. There 



