508 Diseases of Joints. 



Anchylosis from conditions, the nature of which is obscure. 

 7.203. Anchylosis of the Astragralo-calcarcean Joint. — 



Section of the astragalus and os calcis of a young person — in 

 spirit. 



The excision of the ankle-joint had lieen ineffectively performed, 

 and amputation became necessary. 



The cartilaginous surface of the astragalus and os calcis 

 are adherent. There has been no inflammation in this joint, 

 and there is no sign of granulation tissue. G. C. 2842. 



Presented by Professor T. Annanuale. 



7. 204. Anchylosis of the Upper End of the Tibia and 

 Fibula. — Right tibia and fibula — macerated, and showing the 

 above. 



The upper ends of the bones are united by a bridge of new 

 bone fusing them together. The vascular pores on both bones 

 are somewhat larger than usual, but there is no sign of disease. 

 This specimen resembles those of anchylosis in multiple 

 exostosis (6. 377), and may bean allied condition. 



B. C. 2. M. 33. 



IV. NEW GKOWTHS INVOLVING JOINTS. 



7. 205. Osteo-Sarcoma of the Head of the Tibia.— Upper 



ends of a left tibia and fibula — macerated, illustrating the 

 above. 



This specimen is referred to by Dr James Russell in his chapter on 

 "Uncommon Disease," in his treatise upon " TheKnee-joint. " Although 

 the particulars of this case were not detailed, the symptoms described in a 

 general way were those of a rapidly increasing sarcoma of the bones form- 

 ing the joint. 



The original texture of the head of the tibia is greatly 

 altered, being in many places absorbed, while what remains is 

 irregularly eroded and rarefied, so as to resemble the ejffects of 

 a severe septic inflammation. All round the upper end, where 



