Fractures into the Ankle-Joint. 151 



and at other places the broken surface has been smoothed over. 

 The vascular pores are enlarged over the greater part of the 

 surface. The fracture has probably been compound. 



B. C. I. 1. M. 46. k. 



FRACTURES INTO THE ANKLE-JOINT. 



{a.) Involving chiefiy the Tibia. 

 3. 304. Comminuted and Splitting Fracture of the Tibia» 



involving" the Ankle-joint. — Lower half of a right tibia — 

 macerated, showing the above. 



The fracture has begun about six finches above the joint, 

 and has run down in an irregularly spiral manner into the 

 lower end, the fissures meeting one another, so that portions of 

 the bone have become detached. 



There are marks of periosteal activity on the fragments 

 Apparently, therefore, the fracture has been compound, and 

 amputation has been performed a few weeks after the injury. 



G. C. 175. b. 



3. 305. Fracture of the Tibia, involving the Ankle-joint 



— comparatively recent. — Inner half of a section of the 

 lower end of a left tibia, astragalus, and os calcis — muscles 

 dissected off — in spirit, showing the above. 



The line of fracture has passed from above and behind 

 downwards and forwards, and seems to have just reached the 

 ankle-joint. The lower fragment of the tibia is displaced back- 

 wards. The broken surfaces of the cancellous tissue and 

 adjacent periosteum seem to be infiltrated with recent lymph. 



G. C. 3305. 



3. 306. Comminuted Fracture of the Lower End of the 

 Tibia, involving the Ankle-joint.— Lower ends of a 



