Cleft Lip and Cleft Palate Is Structural Birth Defects
What are the different types of birth defects?
There are two main types of birth defects: structural and functional/developmental.
- Structural birth defects are related to a problem with body parts. Some physical problems include cleft lip or cleft palate, heart defects, such as missing or misshaped valves, and abnormal limbs, such as a club foot. They also include neural tube defects, such as spina bifida, problems that are related to the growth and development of the brain and spinal cord.
- Functional birth defects are related to a problem with how a body part or body system works. These problems often lead to developmental disabilities.
Cleft lip and cleft palate facts
- Cleft lip and palate are developmental defects of the upper lip and roof of
the mouth that are present at birth (congenital malformations).
- Cleft lip and
palate may occur separately and in combination.
- Both malformations occur as a
consequence of incomplete fusion of the developing lip (normally occurs by 35
days of gestation) or of incomplete fusion of the hard or soft palate (normally
occurs by the eighth to ninth week of gestation).
What is a cleft lip? What is a cleft palate?
A cleft lip is an opening extending through the upper lip. It may be in the
midline (center) or left and/or right side of the lip. A cleft palate is an
opening of the hard palate (the bony front portion of the roof of the mouth) or
the soft palate (the muscular non-bony region in the rear of the roof of the
mouth. Similar to a cleft lip, a cleft palate may be midline and/or to either
right of left side of the palate. A cleft palate may extend from the upper
jawbone to the rear of the throat.
Since development of the lip and palate occur at different times during
gestation, an infant may have either a cleft lip or cleft palate or clefting of
How often do these birth effects occur?
Cleft lip, either as a sole malformation or coupled with cleft palate occur in approximately one in 700 live births. Boys are twice as likely to have a cleft lip with or without an associated cleft palate. On the other hand, girls are more likely to have a cleft palate alone (those not associated with a cleft lip malformation). Ethnic background has been shown to affect the frequency of clefts. Children of Asian, Latino, or Native American ancestry are more frequently affected when compared to those of Caucasian background.
What are the
causes and risk factors for developing a cleft lip and cleft palate?
While gender and ethnic background are risk factors, as described above,
there are other factors that seem to play a role in causing clefting.
Specialists have noted that the more severe the defect in a child the higher the
risk for a cleft malformation in subsequent siblings. The recurrence risk for a
cleft deformity is 2.7% if an older sibling has a single cleft lip. If an older
sibling has bilateral (both sides of the upper lip) involvement, the recurrence
risk is doubled (5.4%). If a parent has had either cleft lip or palate, there
exists a 4% likelihood of cleft malformation in their children. However, if an
affected parent has a child with cleft lip or palate, the chance of future
children experiencing a cleft malformation rises to 14%.
How do physicians diagnose a cleft lip and cleft palate?
The diagnosis of cleft lip at birth is obvious. All newborn infants are screened at birth for cleft palate. Direct illuminated examination of the infant's hard and soft palate is part of the complete exam of any newborn. In addition, the palate (both hard and soft regions) are palpated with the examiner's finger to ensure that a "partial cleft" is not missed. Partial clefting occurs when a bony or muscular defect of the palate are obscured by intact skin covering the tissue separation (similar to covering a hole in beach sand with a towel).
Prior to birth, prenatal ultrasound examination may demonstrate malformation of the upper lip, nasal opening, or palate. Since as many as 35% of conceptions with cleft lip and palate may be associated with other non-oral cavity deformities, specialized ultrasounds may be indicated. Similarly, the obstetrician may recommend blood tests and an amniocentesis. A referral to a perinatologist (an obstetrician with specialized training in high-risk pregnancies) or a geneticist may be suggested.
Other birth defects that are associated with cleft lip and palate may include the following:
- Common cardiac defects
- Pyloric stenosis (narrowing of stomach as it connects to the small intestine)
- Club foot
What are complications of a cleft lip and cleft palate?
There are a number of complications that may affect infants and children with
cleft lip and palate. These include the following:
- Feeding problems: Because of the
anatomical defects, it may be very difficult for newborn infants to breastfeed
successfully. The abnormal separation of the upper lip makes it very difficult
for the newborn to obtain a good seal that is necessary for a successful nursing
experience. Routine nipples for bottle-feeding present the same problem;
however, specialized bottles and nipple systems exist that facilitate effective
nutrition. Those children with a cleft palate are commonly fitted with a
removable artificial palate very early in life. This device limits the
possibility of passage of liquids through the defect into the nostrils as well
as also facilitating the ability to efficiently suck on the specialized nipple.
- Ear infections/hearing loss: Children with cleft palate are more likely to
have recurrent ear infections and associated fluid accumulation in the inside of
the eardrum. In order to limit these issues, most children with cleft palate
have PETs ("tubes") placed through the eardrum during their early months.
- Speech problems: As would be expected, the malformations associated with cleft
palate and lip may impact articulation. The most common issue tends to be a
nasal quality to their voice. Corrective surgery may lessen these speech issues
but most children with cleft lip and/or palate benefit from formal speech
- Dental problems: Children with cleft lip and/or palate commonly have
issues with missing and malformed teeth and commonly require orthodontic
treatments and occasionally oral surgery if the upper jawbone (maxilla) has
impaired function (such as improper placement and abnormal positioning of
Medically Reviewed by a Doctor on 3/21/2016