Cleft Lip Is Usually Associated with a Notch or Cleft

Cleft lip is usually associated with a notch or cleft of the underlying alveolus and a cleft of the palate.Cleft lip repair is most often performed when the infant is about 3 months of age.Cleft lip is described as:

A) two skin ridges situated near the midline of the central philtrum of the lip.
B) absence of one or both philtral clefts with a notch in the alveolus.
C) a deficiency of tissue (skin, muscle, and mucosa) along one or both sides of the upper lip.
D) absence of the frenulum with resultant mandibular defect.