Tubercular Arthritis suhsiding, 453 



light, the interior being rarefied and absorbed. There has been 

 little or no new bone formed on the shaft. The shafts of both 

 femur and tibia are unduly straight, a change seen in very- 

 chronic cases with anchylosis in the flexed position. 



F. P. C. 776. 



7. 70. Invasion of Articular Surfaces, Tubercular Arth- 

 ritis subsiding^. — Lower end of a left femur, illustrating 

 the above. 



The lower end of the bone is straighter and lighter than 

 usual, the articular surface is irregular, rarefied, and eroded in 

 many places, and partly absorbed, but the surface has apparently 

 been injured during maceration. 



This probably has been a case where anchylosis had taken 

 place in the tlexed position, with partial cure of the disease. 



F. P. C. 397. 



7. 71. Tubercular Arthritis, subsiding-.— Lower end of a 



left femur of a young person — macerated, showing changes, 

 chiefly in the outer condyle. 



The bone as a whole is lightened, and the shaft is unduly 

 straight. There is great irregularity from erosion and 

 absorption on the articular surface of the outer condyle, 

 especially towards the back. The trochlear surface is also 

 somewhat irregular. There is some erosion on the back of 

 the inner condyle, and an excavation on the shaft above the 

 back of the outer condyle. No new periosteal bone has been 

 formed. There seems to have been more or less anchylosis in 

 the flexed position, with some tendency to cure. G. C. 3464. 



7. 72. Tubercular Arthritis, with great Loss of Bone, 



subsiding". — Lower end of the right femur of a young person — 

 macerated, with loss of the outer condyle. 



