Osteo-Sarcoviata. 361 



6.397. Exostosis of the Fibula. — Plaster cast of the same foot 

 after removal of the tumour. 



There is thickenmg all round the ankle. G. C. 2674. 

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



Osteo-Sarcomata, i.e. Tumours firobably similar to the previous 

 ones, but more ra])i()ly growing. 



6. 398. Slow-grrowing" Osteo-Sarcoma of the Tibia.— Upper 



end of the right tiLia of a young person — macerated, illustrat- 

 ing the above. 



A very large osseous tumour has grown from the upper 

 end of the bone. The only recognisable part of the shaft at 

 the upper end is a small portion on the posterior surface. The 

 surface is thrown out into numerous irregular processes, of a 

 somewhat friable bone, directed outwards from the shaft. 



From the amount of bone formed this tumour has prob. 

 ably been of comparatively slow growth. B. C. i. 6. M. 1. 



6. 399. Slow-growing Osteo-Sarcoma of the Tibia.— Wax 



model representing the previous specimen when fresh. 



One side shows the aj^pearance of the tumour when the 

 skin was dissected off; the other shows the appearance of the 

 bone when newly macerated. B. C. i. 6. M. 2. 



6. 400. Osteo-Sarcoma of Skull. — Greater part of the vault of a 



skull — macerated, illustrating the above. 



A churchyard prepai'ation from the north of Scotland. 



"The patient was a herd-girl, aged 26. About eight years before 

 her death she exhibited symptoms of dementia, which gradually advanced 

 to a maniacal state. She suflered from fearful headaches. A growth 

 appeared on the side of her head, on the right parietal bone, and gradually 

 increased in size. Suppuration took place in it, and opened externally." 



The whole top of the skull is covered with — in fact, is 

 converted into — a very extensive growth of new bone in the 



