The lip and palate are involved in the cleft, but no other congenital anomalies are present.
The cleft of the lip can be unilateral (1-sided) or bilateral (two-side). The cleft can be complete (involving the nasal floor) or incomplete.
If the clefting involves the alveolar ridge, a notch or true cleft can be seen on one or both sides.
The palate can be partially of completely open.
Surgical repair is indicated; the timing and stages in which this is performed differ between cleft teams.