Atrophy of Bone. 203 



6. 12. Atrophy of the Tibia and Fibula, following- 

 Anchylosis of the Knee-joint from Disease.— Left 



tibia and fibula and lower end of corresponding femur and 

 patella — macerated, to show the above. A portion has been 

 removed from the head of the tibia to show the condition of 

 the cancellous tissue. The bones are very greasy, and were 

 made only tolerably clean after having been several times boiled 

 in soda solution. 



The patient had suffered from knee-joint disease, and many years 

 before amputation the limb had become anchylosed in a flexed position. 

 It was removed because it was in the way. 



The shafts of both bones are diminished in size, and are 

 bent slightly backwards. The compact tissue, however, is 

 strong, and the bones are apparently not lightened in proportion 

 to their diminished size. The section through the cancellous 

 tissue shows it to be stronger and firmer in the epiphyses than 

 in the upper part of the shaft. The patella has been anchylosed 

 by bone to the femur. The articular surfaces of the femur and 

 tibia are irregular, but without any sign of existing active 

 disease. The changes in these bones may be attributed 

 partly to disuse and partly to other results of the previous 

 knee-joint disease. G. C. 3554. 



Frescnted by A. G. Milleu, F.R.C.S.E. 



6. 13. Atrophy of the Bones of the Foot from Disuse — 



Section of the bones of a right foot — macerated, to show the 

 above. 



The patient had been unable to walk properly for some years, owing 

 to the gradual enlargement of a central sarcoma of the fibula, for which 

 the leg was eventually amputated. 



The texture of the bones is light and greasy. 



G. C. 3235. 



Presented by P. H. Watson, F.R.C.S.E. 



6. 14. Atrophy of the Bones of Leg- and Foot from Disuse, 



