364 Diseases of Bone 



6. 406. Cystic Osteo-Sarcoma of Femur. — Portion of the 



shaft of the same femur as the last — macerated, illustrating 

 the above. 



There is a remarkable development of delicate osseous 

 plates growing from the shaft. These plates are themselves 

 composed of finer processes and plates of bone. The open 

 nature of the larger plates may be associated with the cystic 

 character of the tumour. G. C. 314. a., 321. 



Fresented hy George Bell, F.R.C.S.E. 



6. 407. Cystic Osteo-Sarcoma of Femur. — Portion of the 



soft part of the tumour from the previous case — in spirit. 



It appears to be composed of a soft, fibrous material 

 containing numerous cysts. G. C. 314. c. 



6. 408. Osteo-Sarcoma of Fibula. — Left fibula of a young person 

 — macerated, illustrating the above. 



Surrounding its upper end there is a mass of new bone, 

 delicate in structure, and composed of numerous fine plates and 

 spicules. Some of these run horizontally outwards, while others 

 pass vertically, parallel with the long axis of the bone. 



B. C. I. 6. M. 10. 



6. 409. Osteo-Sarcoma of the Lower End of the Femur. 



— Section of the lower end of a right femur — in spirit, illus- 

 trating the above. 



The patient was an athletic and powerful man, about 35 years of 

 age. For some months before amputation was performed, he had felt 

 obscure pains about the knee. These were thought to be due to varicose 

 veins. Afterwards a swelling appeared, and even then the condition was 

 obscure. He was seen by several leading surgeons, and the diagnosis of 

 sarcoma was at length arrived at. Amputation below the trochanter 



