Fig. 149. Fig. 150. Fig. 151.
Types of Unilateral Cleft.
The degrees of deformity of the soft parts in the unilateral variety are shown in [Figs. 149 to 151], respectively, representing the first, second, and third degrees of the cleft deformity, according to the involvement of the lip tissue. In first degree are included small notches in the prolabium only or extending upward somewhat above its margin, but not involving the entire lip. In the second degree both the vermilion border and the lip are divided, while in the third degree the cleft extends into the nose with an absence of part of the lip structure itself.
Since the deformity in the division under discussion is so commonly met with it will be considered fully under its operative correction.
3. Facial Cleft.—The third class of deformity includes either unilateral or bilateral fissure of the face.
In the unilateral variety the cleft usually begins at the outer section of the upper lip, involving, as a rule, only the soft parts, extending upward and irregularly around the alæ of the nose to the inner canthus of the eye, or going even beyond the orbit and over the forehead as far as the hair line. An illustration of such a case is shown in [Fig. 152].
The bilateral form of this facial defect is rarely met with. A case reported by von Guersant is shown in [Fig. 153].
Fig. 152.—Unilateral Facial Cleft. (Hasselmann.)
