712 
BURSATIfi. 
this action, the recurrence of the malady is certain. If we 
take a case occurring on the site of a cicatrix, there may, 
at first, be nothing to excite suspicion beyond the part being 
a little elevated above the surface, in which state it may 
remain for some time, until suddenly, from some irritating 
cause, it becomes the seat of active action. It is now hot, 
painful, tender, and excoriated, and gives exit to exudative 
matter, which scabs on the surface. The discharge is of a 
yellow, gummy-like character, and hangs about the under 
part of the ulcer, having an appearance exactly like that 
which is exuded by a “ farcy bud.” Ulceration now sets in, 
and the edges of the sore become everted and throw out 
luxuriant growths which are quite hard. The further pro¬ 
gress of the disease consists essentially in the development 
of papillse, which ultimately form a warty cauliflower-like 
excrescence. The papillae, after awhile, become longer and 
more developed, gaining a strong attachment to the tissues 
beneath. The surface of the ulcer will now present a large 
red mulberry-like appearance, with white specks of tissue 
here and there. The circumferent boundary of the ulcer is 
well marked by a white zonula of skin. The papillae are 
spoken of as the cores, or canker of “ bursatiethey can 
occasionally be drawn out by a pair of forceps. There is 
no tendency for these ulcers to become scabbed, their form 
being quite antagonistic to that mode of healing. The 
number of papillated ulcers which may exist at the same 
time varies considerably. I have seen from one, two, or three, to 
eighteen or twenty, in the same subject. If they are neglected, 
or not subjected to treatment, they will obtain a most for¬ 
midable size, and project, in an egg-shaped form, from the 
surface to the height even of a couple of inches. If the 
ulcer is allowed to pursue its own course it may, after a long 
time, make an attempt at healing. The surrounding skin 
gradually ascends the circumferent papillse, and, on reaching 
their summits, it commences to draw towards the centre of 
the sore, until, at last, it suddenly becomes arrested, appa¬ 
rently from having stretched itself to the utmost. In conse¬ 
quence of this arrest a central opening is left, perhaps for the 
purpose of giving exit to exudative matter. In this state the 
sore frequently remains for some time, until from some irri¬ 
tating cause or injury, such, for example, as the part being 
gnawed by the animal, it reopens, and then the papillated con¬ 
dition returns as perfect as it was before. Should the attempt 
at healing be completed, by which I mean for the whole sur¬ 
face of the ulcer to become covered by a cicatrix, its after 
course will be the same as when the healing was only par- 
