TUMORS, 243 
TX. 
TUMORS. 
Cutaneous papillomata, common to animals, are more frequent in 
horses and cattle than in other species. They are observed on all regions, 
but those which are most affected are the head, the inferior face of the 
trunk, the genital organs, and the internal face of the legs. In horses, 
donkeys and mules, papillomata sometimes exist in great number, so 
that they can be counted by hundreds over the surface of the body. On 
a cow treated by Lehnert their weight amounted to twenty kilos. They 
vary in size from that of a pea to that of a nut, and sometimes form 
masses as big as the fist. 
Although these tumors are not serious in themselves, they are much 
exposed to traumatic action, bleed easily, become inflamed and secrete a 
purulent fluid which dries on their surface or putrefies and has a fetid odor. 
They may also interfere with the motions of the animal or with other 
functions, and when they exist in great numbers they soon have an evil 
effect on the general condition. 
The considerable number of warts which sometimes exists on one 
animal has suggested the admission of a “papillomatous diathesis.” 
Hertwig has claimed that these productions were hereditary. It has been 
supposed that secondary tumors sometimes develop in parts soiled by the 
blood of a primitive growth. Their contagious nature has been admitted 
for a long time by outsiders. Majocci, Cornil, and Babés have found in 
‘them a special parasite—the dacterium porri. 
In young animals it is not rare to see warts disappear spontaneously, 
even when they exist on comparatively wide surfaces. The same termin- 
ation of these may be observed at all ages. Liibke has related the case of 
a thirteen-year-old horse covered with warts of all sizes, which dropped 
off without any treatment, leaving wounds which cicatrized regularly. But 
these spontaneous recoveries are exceptional, and when warts are numer- 
ous, voluminous, or when they simply interfere with functions, they de- 
mand an active treatment. The internal therapeutics (calcinated magne- 
sia, arsenious acid, mercurials) succeed only with benign ephemeral forms 
or with those whose time of recovery has arrived. If magnesia given in 
doses of 0.30 centigrams to two grams a day seems to bring on the slough 
of the labial warts of the dog, we know that they disappear spontaneously ; 
and the case of Liibke, to which many others could be added, shows that 
the result will be the same for cutaneous warts wherever they may grow. 
The only efficacious treatment of permanent warts is their destruction 
