14 
W. L. WILLIAMS. 
Following the classification of Dr. Sutton, under class B 
we have, first; Follicular Cysts, of which in practice we 
meet with two common varieties. 
One of these, the more common, and forming a connecting 
link between the preceding class and the true follicular cysts, 
are the small follicular cysts in connection with the perma¬ 
nent pre-molars, causing well-defined hemispherical tumors of 
the superior maxillary bone over or slightly above the normal 
position of the tooth-fangs. They are observed generally, if 
not always, in animals from several months to two years old. 
Unless suppuration supervene there is little call for treat¬ 
ment, except on account of the blemish, which can in many 
cases be modified largely by prompt removal of the decidu¬ 
ous crown, if still wished, in order to remove the resistance to 
eruption of the permanent tooth. Further modification of 
the blemish can only be effected by sacrificing the tooth and 
cutting away a part or all of the enlargement, In many cases, 
owing to aberrations in the formation of the tooth, as 1 have 
already noted above, resulting in a communication between 
the crown and fang, existing at time of eruption between the 
folds of involuted enamel, leads to suppuration of the cyst, 
which may find exit externally through the maxillary bone, or 
internally, alongside the tooth into the mouth, or into the 
nostril. 
Figs. 2 and 3 represent suppurating follicular cystic odon- 
tomes of the second pre-molars of this class, from two-year-old 
colts. 
Suppuration of the cyst entails the destruction of the tooth 
in these cases, and it should be removed promptly and care 
taken to reduce the blemish to a minimum by removing at 
some time the greater part of the protruding maxillary bone. 
Of all odontomes these yield the most promptly and satisfac¬ 
torily to treatment. < 1 
The other variety of follicular cysts, and in fact the typi¬ 
cal ones, occur in relation to the molars, and extend iuto the 
nasal sinuses and passages in the form of thin-walled bladder¬ 
like cysts, and occur, so far as we have observed, in colts from 
a few months to a year and a half old. 
