Fibro-Osscous Tumour. 359 



admission. About that time one lump appeared in the popliteal space, and 

 another over the inner tuberosity of the tibia. These two have grown 

 rapidly, but painlessly, the one over the femur the more slowly. On 

 admission the patient had no pain in the swellings, and could walk with 

 the aid of a stick. She had some numbness and pain in the toes an 

 foot, and the leg was rather cold. The right knee measured twenty- 

 three inches in circumference at the popliteal space. There were thre 

 special swellings — the largest and uppermost, surrounding the lower third 

 of the femur, seemed to grow from the epiphyseal line. The middle one 

 filled up the popliteal space, and the lowest was on the anterior and inner 

 aspect of the leg. These swellings were smooth and rounded ; the skin 

 was drawn tightly round them, but not involved. 



After removal by amputation, on 15tli October, the 

 tumour was sawn up, and found to be capsulated, smooth, 

 and lobulated. The lower tumour had a watered silk appear- 

 ance, like the section of a fibrous tumour. Two separate 

 nodules of tumour substance were found in the gastro-cnemius, 

 and both contained bone. The main mass was found fused 

 with the femur, and was fibrous externally and osseous inter- 

 nally. The popliteal portion was cartilaginous, and showed 

 a transition between fibrous tissue and cartilage. The tumour 

 was considered an " osteo-chondro-fibroma," as it was composed 

 chiefly of bone, fibrous tissue, and a little cartilage. 



The specimen on one side has been stained with logwood, 

 which shows the difference between the osseous and the fibrous 

 parts. The cancellated tissue at the lower end of the femur 

 is replaced by condensed bone, like that in the substance of 

 the femur, but the outline of the shaft is still at places 

 perceptible. Some of the new bone forming the tumour is 

 extremely hard and dense. G. C. 3378. 



Presented by Professor John Cuiene. 



6. 394. Fibro-Osseous Tumour of Lower End of Femur.— 



Portion of same tumour — macerated, to show its bony structure. 

 The section shows the bone to be somewhat porous after the 

 removal of the fibrous tissue. In many places it is composed 

 of plates lying at varying distances from one another, but 

 seldom showing the usual characteristics of cancellated tissue. 



