What Causes It?
Genetic factors - Inherited genes from one or both parents can contribute to cleft formation.
Environmental influences during pregnancy - Various exposures may interact with genetic susceptibility.
Maternal smoking - Cigarette smoking during pregnancy increases risk significantly.
Alcohol consumption - Maternal alcohol use during pregnancy raises risk.
Certain medications - Anti-seizure drugs, acne medications containing isotretinoin, and some other drugs taken during pregnancy.
Insufficient maternal nutrition - Particularly deficiency of folic acid and other B vitamins.
Viral infections - Certain infections during early pregnancy may increase risk.
Maternal diabetes - Poorly controlled diabetes before and during pregnancy.
Maternal obesity - Higher body mass index associated with increased risk.
Advanced maternal age - Older maternal age may slightly increase risk.
Family history - Risk increases if parents or siblings have clefts.
Genetic syndromes - Clefts may be part of genetic syndromes like Van der Woude syndrome, Pierre Robin sequence, or velocardiofacial syndrome.
Male gender - Cleft lip with or without cleft palate is more common in males.
Female gender - Isolated cleft palate (without cleft lip) is more common in females.
In many cases, the exact cause remains unknown despite thorough investigation.
Signs & Symptoms
Physical characteristics:
Visible gap or split in the upper lip (cleft lip).
Opening in the roof of the mouth that may connect the mouth and nasal cavity (cleft palate).
Asymmetrical nose and/or nostril, particularly with unilateral cleft lip.
Dental abnormalities - Missing, extra, displaced, or malformed teeth.
Functional challenges:
Feeding difficulties - Problems creating suction for breastfeeding or bottle feeding.
Excessive air intake during feeding, leading to increased gas and spitting up.
Liquid or food coming through the nose during feeding (nasal regurgitation).
Speech problems - Delayed speech development, hypernasality (too much air through the nose).
Articulation difficulties, especially with certain consonants.
Hearing issues - Increased susceptibility to middle ear infections and hearing loss.
Eustachian tube dysfunction affecting middle ear ventilation.
Dental problems - Misaligned teeth and abnormal bite patterns.
Breathing issues - Possible airway obstruction, especially with associated conditions like Pierre Robin sequence.
Social and psychological impacts:
Potential challenges with self-image and social interactions, particularly during school years.
Impact on facial appearance varies depending on type and severity of cleft and quality of repair.
Associated conditions:
In some cases, clefts may be part of a syndrome with additional health issues.