324 Diseases of Bone. 



6. 312. Syphilitic Enlarg-ement of the Tibia.— Right tibia 



—macerated, illustrating the above. 



There is a comparatively new periosteal node or enlarge- 

 ment on the posterior and inner surfaces, near the upper end^ 

 with marks of increased vascularity on the outer surface lower 

 down. The bone is somewhat increased in weight. 



B. C. I. 5. M. 72. 



6. 313. Syphilitic Enlargement of the Tibia.— Left tibia — 



macerated, illustrating the above. 



There are two distinct nodes on the shaft, — one small, on 

 the anterior ridge two inches below the tubercle, and the 

 other, much longer and larger, on the posterior and inner 

 surfaces, about the middle. A slight periosteal crust is seen 

 just beside the outer tuberosity, on the outer surface. The 

 bone is increased in weight. "W. C. G. 40. 



6. 314. Syphilitic Enlargement of the Tibia. — Lower half 



of a right tibia — macerated, illustrating the above. 



A large periosteal node occupies the greater part of the 

 inner surface, and extends to the back and outside. Its 

 surface is porous, as if the process had been still active. The 

 bone is somewhat increased in weight. B. C. i. 5. M. 76. 



6. 315. Syphilitic Enlargement of the Tibia.— Left tibia- 

 macerated, illustrating the above. 



The posterior and outer surfaces are thickened and rough- 

 ened from new periosteal formation. The lower end of the 

 bone and the front and upper parts of the shin surface are 

 comparatively unchanged. This condition resembles the nodes 

 seen in previous specimens, only more diffused. The bone is a 

 little increased in weight. B. C. I. 5. M. 71. 



