The three primary types of cleft conditions are cleft lip/palate, isolated cleft palate, and isolated cleft lip.
With cleft lip/palate, both the palate and lip are cleft. About one in 1,000 babies are born with cleft lip and palate. Cleft lip/palate:
- Accounts for about 50% of all clefts
- Is more common in Asians and certain groups of American Indians
- Occurs less frequently in African Americans
- Up to 13 percent of cases present with other birth defects
- Occurs more often in male children
Isolated cleft palate is the term used when a cleft occurs only in the palate. Isolated cleft palate:
- Accounts for about 30% of all clefts (1 in 2000 babies)
- Poses similar risk to all racial groups
- Occurs more often in female children
Isolated cleft lip refers to a cleft in the lip only, accounting for 20% of all clefts.