520 Diseases of Joints. 



rarefied. The inner aspect of the left lateral mass at the 

 attachment of the transverse ligament is also somewhat rarefied, 

 and the body of the axis and its odontoid process have been dis- 

 eased, and the substance is light and opened out. 



The cause of death is unknown, but this is one of those 

 cases in which there is great danger of a falling forward of the 

 head. This causes death by drawing the medulla against the 

 odontoid process, G. C. 823. 



Presented by Sir GEOurxE Ballingall. 



7. 228. Tubercular Disease, with Destruction of Bone.— 



Upper four cervical vertebrae — macerated, illustrating the above. 

 The patient, a girl aged sixteen years, had been affected with 

 extensive abscesses in the neck. " She died suddenly after being attacked 

 with difficult breathing and symptoms resembling the common catarrhal 

 fever." 



The lateral masses and posterior arch of the atlas are 

 rarefied and partially absorbed, and similar changes are seen in 

 the body, odontoid, and upper articular processes and left half 

 of the ring of the axis, as well as slightly on portions of the 

 third vertebra. 



In all probability death has been caused by the pressure of 

 tubercular debris upon the medulla oblongata. G. C. 1075. 

 Presented by Adam Huntee, F.R.C.S.E. 



7. 229. Tubercular Disease, with Destruction of Bone.— 



First five cervical vertebrae — macerated, illustrating the above. 



The greater part of the body of the axis has been destroyed, 

 leaving only a bridge of bone, thinner on the left side, between 

 the odontoid process and the lateral masses. There has been 

 some new bone formation on the other vertebrse, and more or 

 less anchylosis has taken place between the second, third, 

 fourth, and fifth vertebrae. The axis has settled down in front 

 upon the third vertebra, so that the head must have projected 



