374 Diseases of Bone. 



'"^6, 425. Osteo - SaPCOma. — Section of an osteo-sarcomatoas 

 tiimour, in -whicli nodules of bone are interspersed among 

 fibrous tissue ; well developed. F. P. C. 2781. 



6. 426. Osteo-Sarcoma of Pubes. — Soft portions of a tumour of 

 the pubes. 



The patient was treated for a long time for psoas abscess, 

 under which complaint he was supposed to be labouring. 



The substance of the tumour is firm, with a few bony 

 spicules at some parts, and softening at others. G. C. 1059. 

 Presented by Professor James Russell. 



6. 427. Osteo-Sarcoma of the Sacrum. — Plaster cast of the 



pelvis of a woman, aged 26 — illustrating the above. 



The patient was in labour for the first time. At the end of forty- 

 eight hours she submitted to the operation of Cresarean section, but died 

 seventeen hours afterwards. The foetus was still-born. (For case, see 

 "Edinburgh Medical and Surgical Journal," No. 106.) 



The tumour had groAvn forwards into the pelvis, and quite 

 obstructed the passage. G. C. 1476. 



Presented by William Campbell, F.R.C.S.E. 



C. Medullary or Central Tumours — ranging from the slowly- 

 growing simple forms whose tissues are well developed {red 

 marrow being normally cellular) to the rapidly -growing- 

 malignant forms whose tissues are more or less embryonic. 



6. 428. Slow-growing- Central Tumour of Lower End of a 



Femur. — Section of the lower end of a femur, with adjacent 

 soft parts — in spirit, illustrating the above. 



The patient, M. G., a young woman aged 27, a dressmaker, wa& 

 admitted to the Royal Infirmary, Edinburgh, on 8th November 18S8, 

 suffering from a large tumour affecting her knee. 



* This and the next two specimens properly belong to the jtrevious group 

 of " Osteo-Sarcomata." The oversight was not recognised until after the type 

 was set up, when it did not seem worth while to re-arrange them. 



