Cartilaginous Tumours. 339 



The weight of the specimen after the operation was twenty- 

 one pounds, of which about eighteen pounds would belong to 

 the tumour. The circumference of the tumour at the widest 

 part was twenty-eight inches. Its consistence was firm and 

 elastic, except at one or two spots, where it had become cystic. 

 The outline Avas nodular, and several large veins were seen on 

 the surface. In cutting the tumour calcareous nodules were 

 met with, so that the knife and saw had to be used alternately. 



The tumour consists of nodules of cartilage varying from 

 the size of a pea to that of a walnut. The smaller nodules, 

 when fresh, were translucent and firm like the substance of 

 the crystalline lens. The large ones were yellowish and some- 

 what opaque, and in some cases had softened at the centre. 

 Kound the nodules there was a delicate stroma of connective 

 tissue, carrying blood-vessels. From these, in some places, lime 

 salts have been deposited, so as to form a calcareous shell round 

 the nodules. Here and there, where several calcareous nodules 

 have united, the interior is transformed into cancellous bone. 

 The outer part of the shaft of the humerus is thickened and 

 sclerosed at the upper end, but the interior is unaffected. 

 The tumour seems to have started from the thickened part, and 

 to have partially surrounded the humerus. 



Microscopically, the tumour was found to consist of hyaline 

 cartilage without special features. 



For further particulars of this case see " Successful removal 

 of the entire upper extremity for Osteo-chondroma, by Thomas 

 F. Chavasse, M.D.," etc., in vol. Ixxiii. of the " Medico- 

 Chirurgical Transactions of London." G. C. 3128. 



Presented hjT. F. Chavasse, F.R,C.S.E. 



6. 355. Chondroma of the Humerus.— Portion of the same 



tumour — macerated, to show how the calcareous matter has 

 been deposited as a shell round the nodules. G. C. 3177. 



Presented by T. F. Chavasse, F.R.C.S.E. 



