Tubercular Disease of the Spine. 535 



4. Arthritis Deformans atlectiiig the spine. 



7. 258. Arthritis Deformans, causing- Anchylosis.— Last 



four dorsal vertebrae — macerated, illustrating the above. 



There is considerable irregularity of the front of the 

 bodies, and an outgrowth of bone at their upper and lower 

 margins, especially on the sides, where in several places the 

 overgrown margins have met, and bridged over the interverte 

 bral discs. B. C. i. 3. M. 73. 



7. 259. Arthritis Deformans, with Anchylosis and a 

 Forward Bend. — Cervical, dorsal, and lumbar portions of a 

 spine — partially macerated and dried, illustrating the above. 



The spine, as a whole, is bent forward. There has been 

 irregular outgrowth at the margins of the bodies, and in many 

 places they have been united by arches of bone, thrown across 

 the intervertebral discs. This is especially noticeable on the 

 right side of the dorsal region. On the left side the heads of 

 the seventh and eighth ribs are fused to the bodies of the 

 vertebrae with which they articulate. B. C. i. 3. M. 9. 



Figiired by Shaw "on Distortion," plate i. fig. 5. 



7. 260. Arthritis Deformans, with Anchylosis and Lateral 

 Curvature. — Left half of a pelvis, with lumbar and lower 

 three dorsal vertebrae — macerated, illustrating the above. 



The front of the sacro-iliac sychondrosis is ossified. There 

 is considerable bony outgrowth at the margins of the inter- 

 vertebral discs, but a special outgrowth of bone formed on the 

 left side of the lumbar bodies has completely united them. The 

 bones all over are somewhat irregular, and the muscular and 

 tendinous impressions are unusually prominent. There has 

 been a slight amount of lateral curvature. B. C. i. 3. M. 7. 

 Figured by Shaw "on Distortion," plate i. fig. 4. 



