238 Diseases of Bone. 



The lower part of the bone, especially on the left side, has 

 disappeared, and the surface round the missing part has been 

 opened out and eroded. G. C. 596. 



c. Where the chief changes ara in the form of enlargement. 



6. 88. Thickening- of the Femur from Chronic Suppur- 

 ative Inflammation of the Compact Tissue. — Left 



femur — macerated, to show the above, 



A portion of the new shell has been removed, to expose the 

 condition of the original surface. 



The periosteal crust is about a quarter of an inch thick, 

 while the original compact tissue is opened out and partly 

 absorbed. This, therefore, seems to have been the seat of the 

 disease, which, by its irritation, has led to the development of 

 new bone from the periosteum. B. C. i. 5. M. 23. 



6. 89. Thickening* of the Femur from Suppurative In- 

 flammation of the Compact Tissue.— Anterior half of 

 the upper end of a left femur — macerated, showing the above. 



The specimen is from the body of a man about 34 years of age. 

 He had complained for nearly eight months of acute pain in that thigh, 

 which gradually swelled, anil eventually was opened, and disciiarged a 

 large quantity of pus. 



The medullary cavity is partially filled up by newly-formed 

 cancellous tissue. Opposite this place, on the outer side, the 

 compact tissue has been opened out. On the surface much new 

 bone has been formed, so as to produce a considerable thicken- 

 ing, v.diich gradually fades oflf into a thin periosteal crust upon 

 the other parts of the shaft. The section has passed through a 

 depression on this enlargement. In this case, therefore, the 

 suppurative inflammation has found an exit opposite the centre 

 of the new mass, and has not caused either necrosis or bone 

 abscess. G. C. 1636. 



Presented by J. Newbiggino, F.R.C.S.E. 



