I'ahcrcular Disease of the Spine. 521 



forward, and the spine of the axis been rendered prominent. 

 This has probably been a case where an abscess connected with 

 the axis has been opened, and turned septic, and having dis- 

 charged for some time before death, has led by its irritation 

 to the new bone formation. G. C. 1182. 



rrcsentcd by Professor Jamks Russell. 



7. 230. Tubercular Disease, with Caseous Deposit between 

 the Bone and the Dura Mater. — Axis and four following 



cervical vertebrae. Spinal canal exposed from behind — in spirit, 

 illustrating the above. 



On the right side the articular processes have been some- 

 what enlarged, and their surfaces are rarefied. Caseous-looking 

 material occupies the intervals between the pedicles, and has 

 formed a thick layer on the outer surface of the dura mater. 



This condition is not very common. When such an 

 accumulation increases, it may cause paralysis by pressure upon 

 the spinal cord. It then constitutes the form of "pressure 

 paralysis " in Potts' Disease, which is most amenable to surgical 

 interference. G. C. 3503. 



7. 231. Tubercular Disease— Destruction of Bodies— Para- 



plegria. — Upper three dorsal and lower six cervical vertebrae 

 of a child — macerated, illustrating the above. 



" Isabella Rennie, aged ten, died 30th November 1831. She was 

 considered a healthy child till about two years before, when she began to 

 have glandular swellings in different parts of the body. In March a small 

 swelling appeared in the upper part of her back. This gradually enlarged, 

 and at the same time her power of moving her legs diminished. At length 

 she lost this power entirely, and also the sensibility of the whole lower 

 part of the body. She had, however, occasional attacks of convulsions in 

 the legs, which caused much pain. She could not retain her urine, but 

 her bowels had always to be assisted by purgations. She gradually 

 declined in health, was subject to violent catarrhal attacks, and gangrene 

 of the hip from pressure became very deep and extensive. The exterior 

 .surface of the joint was thus laid bare. 



