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Cleft Lip and Palate

Cleft Lip and Palate, Symptoms and Causes

Cleft lip and cleft palate are birth abnormalities of the mouth and lip. In the United States, nearly 6,800 babies are born with oral-facial clefts annually. These abnormalities occur less frequently among African-Americans. Cleft lip and cleft palate occur early in pregnancy when the sides of the lip and the roof of the mouth do not fuse together as they should. A child can have cleft lip, cleft palate, or both. Cleft lip and cleft palate together are more common in boys. It is also important to know that most babies born with a cleft are otherwise healthy with no other birth abnormalities.

  • Cleft Palate
    Cleft palate occurs when the roof of the mouth does not completely close, leaving an opening that can extend into the nasal cavity. The cleft may involve either side of the palate. It can extend from the front of the mouth (hard palate) to the throat (soft palate). Often the cleft will also include the lip. Cleft palate is not as noticeable as cleft lip because it is inside the mouth. It may be the only abnormality in the child, or it may be associated with cleft lip or other syndromes. In many cases, other family members have also had a cleft palate at birth.
  • Cleft Lip
    Cleft lip is an abnormality in which the lip does not completely form during fetal development. The degree of the cleft lip can vary greatly, from mild (notching of the lip) to severe (large opening from the lip up through the nose). As a parent, it may be stressful to adjust to the obvious abnormality of the face, as it can be very noticeable.

There are different names given to the cleft lip according to its location and how much of the lip is involved. A cleft on one side of the lip that does not extend into the nose is called unilateral incomplete. A cleft on one side of the lip that extends into the nose is called unilateral complete. A cleft that involves both sides of the lip and extends into and involves the nose is called bilateral complete.

Cleft lip and cleft palate may occur together in an infant, or separately. The degree of the abnormality of both cleft lip and cleft palate can vary greatly. The most common early problem associated with these abnormalities is feeding your baby.

Cleft Lip and Palate Symptoms

The symptoms of these abnormalities are visible during the first examination by your infant's physician. Although the degree of the abnormality can vary, upon inspection of the mouth and lips, the abnormality can be noted, as there is an incomplete closure of either the lip, roof of the mouth, or both.

Cleft Lip and Palate Causes

The exact cause of cleft lip and cleft palate is not completely understood. Cleft lip and/or cleft palate are caused by multiple genes inherited from both parents, as well as environmental factors that scientists do not yet fully understand. When a combination of genes and environmental factors cause a condition, the inheritance is called "multifactorial" (many factors contribute to the cause). Because genes are involved, the chance for a cleft lip and/or cleft palate to happen again in a family is increased, depending on how many people in the family have a cleft lip and/or cleft palate. If parents without clefts have a baby with a cleft, the chance for them to have another baby with a cleft ranges from 2 to 8 percent. If a parent has a cleft, but no children have a cleft, the chance to have a baby with a cleft is 4 to 6 percent. If a parent and a child have a cleft, the chance is even greater for a future child to be born with a cleft. Genetic consultation is suggested.

Cleft Lip and Palate Health Effects

Beyond the cosmetic abnormality, there are other possible complications that may be associated with cleft lip and cleft palate, including the following:

  • feeding difficulties
    Feeding difficulties occur more with cleft palate abnormalities. The infant may be unable to suck properly because the roof of the mouth is not formed completely.
  • ear infections and hearing loss
    Ear infections are often due to a dysfunction of the tube that connects the middle ear and the throat. Recurrent infections can then lead to hearing loss.
  • speech and language delay
    Due to the opening of the roof of the mouth and the lip, muscle function may be decreased, which can lead to a delay in speech or abnormal speech. Referral to a speech therapist should be discussed with your child's physician.
  • dental problems
    As a result of the abnormalities, teeth may not erupt normally and orthodontic treatment is usually required.