360 Diseases of Bone. 



The outer surface of the bone is rough, in most places owing 

 to the intervals between the plates of bone, but at others, from 

 needle-like radiating processes, resembling those seen in an 

 ossifying sarcoma. G. C. 3379, 



Presented by Professor John Chiene. 



6. 395. Fibro-Osseous Tumoup of Lower End of Femur. — 



Portions of bone from the previous specimen, which were 

 developed in the fibrous tissue, but separate from the main 

 mass. Their characteristics are similar. 



The tumour illustrated by this and the two preceding 

 specimens may be classed as simple in the slowness of its 

 growth and high development of most of its tissue, including a 

 large proportion of bone, but as " malignant " in the steady 

 increase of its size, in having disconnected centres of ossification, 

 as well as in the arrangement of its bony plates. It should be 

 stated also that while most of the fibrous tissue which formed 

 it was fully developed, there were more rapidly growing parts 

 which were softer in consistence and more embryonic in 

 character. G. C. 3379. a. 



Presented by Professor John Chiene. 



6. 396. Exostosis of Fibula.— Plaster cast of the left foot and 

 ankle of a girl, aged nine, illustrating the above. 



She was admitted to the Ro3-al Infirmary, Edinburgh, on 

 5th August 1859, under the care of Dr. Gillespie. 



The tumour had grown for four years, " gradually encroach- 

 ing on the tibia and towards the ankle." 



" The exostosis was broadest at its attachment to the 

 bone. It had caused the absorption for a considerable portion 

 of the anterior and outer portion of the tibia." G. C. 2673. 

 Presented by 3 . D. Gillespie, F.R.C.S.E. 



