Extracts from Domestic dt Foreig-n Journals, Veterinary, 
XMCedical, Agricultural, Sporting*, dt.c. 
An Essay on Chronic Podotrocholitis. 
By Dr. BRAUELL, Professor at the University of Kasan. 
[Continued from page 416.] 
Diagnostic . — The special characteristics of chronic podotrocho- 
litis present it to us as an essential disease peculiar to the trochlea 
of the foot, and distinct from all other affections attacking that 
part. It is well known that the trochlea is subject to numerous 
morbid alterations, besides the one that now occupies our atten- 
tion : acute inflammation of the organs contained in the hoof; par- 
tial phlogosis of the neighbouring ones, and fractures of the coffin 
bone; all which accidents re-act upon the trochlea, producing vari- 
ous modifications in it. The same effect is produced by suppura- 
tive affections, the pus from which diffuses itself through the whole 
structure, and arrives at this part ; also by nails picked up, which 
pass through the flexor tendon, &c. Fractures of the navicular 
bone are not unfrequent. The fractured bone separates itself, as has 
been observed by Yatel, from the parts to which it was united, 
and is discharged along with the secretion. Sometimes it con- 
tracts an adhesion with the os pedis, or with that and the coronet 
bone, so that the three separate bones become confounded in one ; 
or the flexor tendon is ruptured above its insertion into the coffin 
bone, &c. These various affections should be carefully distin- 
guished from chronic podotrocholitis, if we would not throw the 
pathology and therapeutics of inflammation of the trochlea into 
endless disorder and confusion. A comparison of those affections 
which have their seat in the same region as podotrocholitis, shews 
us that there are symptoms and appearances by means of which 
we may succeed in establishing a distinctive diagnosis. I shall 
pass in silence over those diseases whose diagnostics present no 
difficulties, and confine myself exclusively to those with regard to 
which there may be a doubt, or which may lead to error ; of such 
are — fracture of the coffin bone, rupture of the flexor tendon, in- 
flammation of the sesamoids, undeveloped exostosis and windgalls 
of the cannon bone and tendon. 
