472 Diseases of Joints. 



the circular eroded appearance produced by tubercular granula- 

 tions. New bone has been thrown out round the lower end, 

 especially on the outer and posterior surfaces. G. C. 1154. 

 Presented hy Professor James Russell. 



7. 119. Old Standing" Tubercular Arthritis, involving" the 

 Tibia, Astragalus, and Os Calcis.— Lower end of a left 



tibia, anchylosed to the remains of the astragalus, and that again 

 to the OS calcis — macerated, illustrating the above. 



The lower end of the tibia is enlarged at the sides and 

 hollowed out in front. The astragalus is anchylosed by bone 

 to the lower end of the tibia, and its original shape is scarcely 

 recognisable. The os calcis, in like manner, is anchylosed to 

 the astragalus. The texture of these two tarsal bones, as well 

 as of the lower end of the tibia, is expanded and light. This has 

 evidently been a case of long-standing disease, partially cured, 

 but probably still slowly progressing in the lower end of the 

 tibia. B. C. ii. M. 40. 



120. Tuberculosis of Ankle.— Plaster cast of the front of a 

 right ankle and foot. There has been great swelling in the 

 region of the ankle, especially on the inner side, where there is 

 also a large tubercular-looking ulcer of the skin. There seems 

 to have been some outward displacement of the foot. 



F. P. C. 2883. 



THE JOINTS OF THE FOOT. 

 a. Changes primarily or chiefly in the synovial membrane. 



7. 121. Tubercular Disease of the Foot.— Sections of the 



left foot of a girl — injected, and in spirit, illustrating the 

 above. 



