704 OPERATIONS ON THE FOOT. 



out by degrees. It is still adherent by its base and cannot be 

 pulled out with the forceps unless by tearing and with acute pain, 

 and this is often followed by slight hemorrhage. A few days 

 later it will, however, become entirely loose, and in its place there 

 will remain a oylindroid open cavity extending through the tu- 

 mor, from its summit to its bottom, and from this a deep wound 

 results, followed by a sero-bloody secretion, mingled with pus. 

 As soon as the slough has taken place, or when it begins, the 

 lameness subsides, as well as all the other phenomena of the pain. 

 The wound heals up rapidly if there is no complication. 



Cutaneous may easily be complicated with tendinous quittor if 

 the disease or process of sloughing of the mortified tissues ex- 

 tends to the tendons or ligaments of the region involved. This 

 complication is specially common in bovines, where cutaneous 

 quittor generally gives rise to more swelling and greater suffering 

 than in the horse. 



The quittor has quite a rapid progress, and may last from 

 eight to fifteen days; very seldom longer. At times, it seems to 

 be a single furuncle ; at other times, there are several existing to- 

 gether. Often again, they come in succession, the first one treated 

 being soon followed by others. This is said to take place princi- 

 pally when the diseased part remains exposed to the action of ir- 

 ritating substances, and relapses are prevented by protecting the 

 part from the effects of these occasional causes. 



II. Pathological Anatomy. — It is an inflammation of the 

 very abundant sub-cutaneous cellular tissue of the region, spread- 

 ing from a starting point ; the inflamed tissues are mortified and 

 becomes gangrenous, and by a process of suppuration, the econ- 

 omy attempts to eliminate them. The slough represents more 

 particularly the infiamed cellular tissue, which is thickened, and 

 which has become filamentous and hard and much impregnated 

 with purulent serosity. 



III. Etiology. — Contusions of the region, bruises and punc- 

 tured wounds are quite frequent causes of cutaneous quittor, but 

 it may also take place without evidence of determining causes. 

 Mud, manure, urine, all filth in which animals have to walk or re- 

 main, are also considered as causes. For this reason the disease 

 is more common in the fall and winter, on account of the action 

 of cold at times, and frozen mud. It is also more frequent in cities 

 than in the country. Eay observes that the mud of cities is al- 



