210 



MR. J. B. SUTTON ON DISEASES OF 



[Apr. 20, 



back. However, an examination of such pieces of the cord as 

 remained showed well-marked and indisputable sclerotic changes. 



In 1842 Sir James Paget and Dr. William Budd ' almost simul- 

 taneously directed attention to the frequent symmetry exhibited by 

 disease of the tissues of the body. For example, an eruption on 

 the skin of one leg is occasionally imitated by an eruption ou the 

 opposite leg, symmetrical, not only in position, but often in the 

 shape of the patch, in the grouping, and even in the number of 

 spots in each group. This symmetry is not merely confined to skin 

 eruptions, but to diseases of the joints, sense-organs, nerves, bones, 

 tumours, &c. Examples of symmetry occur very frequently in 

 animals as a result of disease ; and the following cases will serve as 

 striking instances. 



In the accompanying drawings (fig. 3) will be seen the sc-apula 



Fiff. 3. 



Examples of symmeti-ical exostoses (c)in the skeleton of a Monkey, affecting the 

 scapula, great trochanter, and coracoid process. The tumours on the 

 opposite bide were exactly similar in shape and situation, and nearly 

 equal in size. 



and femur of a Bonnet-Monkey that died of bronchitis complicating 

 rickets. The inferior angle of the scapula is occupied by an osseous 

 tumour containing tracts of cartilage. The base of the coracoid 

 process presents a rounded projection, winch would probably have 

 grown into a tumour had the Monkey lived. The great trochanter 

 of the femur presents also a rounded tumour similar to that of the 

 scapula, but containing less cartilage. Each humerus presented a 



' Med.-Chir. Trans, vol. xxv. 



