Bone Abscess. 241 



The lower end of the tibia is much enlarged, and there is a 

 cavity in the interior extending half-way up the bone, but 

 partially interrupted by cancellous tissue. The enlarged part 

 of the bone has been trephined, and the upper end of the cavity 

 has been reached, but drainage has evidently been incomplete, 

 for the lower portion of the cavity communicates by only a 

 narrow aperture with the trephine hole, and is enlarged. The 

 periosteal thickening of the tibia corresponds to the cavity 

 inside. The fibula is enlarged about its middle, and especially 

 on the inner aspect. G. C. 3212. 



Fresented by k. G. Miller, F.K.C.S.E. 



6. 97. Abscess in the Lower End of the Tibia.— Left tibia, 



in section, and fibula — macerated, showing the above. 



The surface of the tibia on the lower two-thirds shows 

 considerable alteration. A large node-like swelling is seen in 

 front, about the middle. Below this there is a considerable 

 deficiency, with an aperture leading from it into a cavity 

 situated above the lower articular surface. The walls of the 

 cavity are lined by cancellated tissue, with only slight thicken- 

 ing round the sides. The bone tissue however, above and below 

 the cavity, is condensed. The upper end of the bone seems 

 normal. The fibula is thickened near the affected part of 

 the tibia. The appearances are not typical of an ordinary bone 

 abscess, and the condition may have been tubercular. 



F. P. C. 423. 



6. 98. Abscesses and Chronic Ostitis in the Tibia.— Lower 



two-thirds of a fibula, and section of tibia — macerated, to show 

 the above. 



" Twenty-six years ago the patient, T. S., a man aged 39, was 

 affected apparently with necrosis of the tibia, which bone is evidently 

 much enlarged. Nine years ago he was first attacked with his present 

 complaints, from which he recovered completely in five months, and 

 continued perfectly well until within six months of the present date, 

 when he again relapsed, after exposure to cold and wet. 



Q 



