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Cleft Lip and Palate – A Complete Guide for Patients and Families

What is Cleft Lip/Palate?

A cleft lip is a birth defect in which the upper lip does not form completely, leaving a gap that can range from a small notch to a large opening that extends into the nose. A cleft palate occurs when the roof of the mouth (palate) fails to close fully, creating an opening between the oral and nasal cavities. When both the lip and palate are involved, the condition is often referred to as a cleft lip and palate. These anomalies are present at birth and result from incomplete fusion of facial structures during the first 10 weeks of embryonic development.

While the defect is visible on the outside (cleft lip), a cleft palate may be hidden inside the mouth, making it harder to detect without a thorough oral examination. The condition can affect feeding, speech, hearing, dental development, and psychosocial wellbeing.

According to the World Health Organization (WHO), cleft lip and/or palate affect roughly 1 in 700 live births worldwide, making it one of the most common craniofacial anomalies <sup>[1]</sup>.

Common Causes

The exact cause of a cleft lip/palate is usually multifactorial, involving a combination of genetic, environmental, and lifestyle factors. Below are eight‑to‑ten of the most frequently identified contributors:

• Genetic mutations: Variants in genes such as IRF6, PAX9, TBX22, and MSX1 have been linked to isolated or syndromic clefts <sup>[2]</sup>.
• Family history: Having a first‑degree relative with a cleft increases risk 2–4‑fold.
• Maternal smoking: Women who smoke during pregnancy have a 1.5–2‑fold higher risk of delivering a child with a cleft <sup>[3]</sup>.
• Alcohol consumption: Heavy drinking in the first trimester is associated with an elevated risk.
• Maternal nutrition: Deficiency of folic acid or vitamin B12 during early pregnancy is a known risk factor.
• Medication exposure: Certain anti‑epileptic drugs (e.g., carbamazepine, valproic acid) and retinoids can interfere with palate formation.
• Maternal diabetes: Poorly controlled pre‑gestational diabetes triples the likelihood of a cleft.
• Infections: Rubella, cytomegalovirus, or toxoplasmosis during early gestation can disrupt facial development.
• Environmental pollutants: Exposure to high levels of pesticides, polychlorinated biphenyls (PCBs), or air‑borne particulates has been implicated in some epidemiological studies.
• Syndromic conditions: Over 300 genetic syndromes include cleft lip/palate as a feature (e.g., Van der Woude syndrome, Pierre Robin sequence).

Associated Symptoms

Because the palate separates the oral and nasal cavities, an open cleft can produce a range of secondary problems. Commonly observed symptoms include:

• Feeding difficulties: Infants may struggle to create suction, leading to choking, excessive milk loss, and poor weight gain.
• Nasally‑runny speech: Air may escape through the nose, causing hypernasal speech once the child begins to talk.
• Ear infections (otitis media): Improper Eustachian tube function often leads to recurrent middle‑ear infections and possible hearing loss.
• Dental anomalies: Missing, misshapen, or extra teeth and malocclusion are frequent.
• Facial asymmetry: The cleft can affect the shape of the nose, alveolar ridge, and overall facial balance.
• Psychosocial impact: Children may experience bullying or low self‑esteem, especially before surgical repair.
• Speech articulation problems: Errors such as “spooning” or “glottal stops” often arise when the palate does not close properly.
• Breathing difficulties: Large clefts that involve the nasal floor can compromise airway patency.

When to See a Doctor

Because a cleft lip/palate is usually identified at birth, prompt evaluation by a pediatrician or neonatologist is standard. Parents should seek immediate medical attention if any of the following occur:

• Newborn cannot latch onto the breast or bottle, or is losing more than 10% of weight in the first week.
• Persistent nasal regurgitation of milk or fluids.
• Frequent ear pain, fever, or signs of middle‑ear infection.
• Difficulty breathing, especially if the infant shows grunting, cyanosis, or pauses in breathing.
• Visible ulceration or infection along the cleft edges.
• Any sudden change in the size or shape of the cleft after birth.

If you suspect a cleft but have not yet spoken with a health professional, schedule an appointment with a pediatrician or a cranio‑facial clinic within the first few days of life.

Diagnosis

Diagnosis is primarily clinical, but several ancillary studies help define the full extent of the defect and plan treatment.

Clinical Examination

• Visual inspection of the lip, alveolus, and palate.
• Assessment of feeding ability and airway patency.
• Oral examination to identify dental abnormalities.

Imaging Studies

• Panoramic X‑ray (Cephalogram): Evaluates the bony structures of the maxilla and mandible.
• CT Scan (3‑D reconstruction): Provides detailed anatomy for surgical planning, especially in severe or bilateral cases.
• Ultrasound: Occasionally used prenatally to detect clefts as early as 20 weeks gestation.

Genetic Testing

When a cleft appears as part of a syndrome or there is a strong family history, a genetics specialist may order chromosomal microarray or targeted gene panels.

Audiologic Evaluation

Because middle‑ear disease is common, newborn hearing screening (OAE or ABR) and later tympanometry are recommended.

Treatment Options

Treatment is multidisciplinary, involving surgeons, speech‑language pathologists, orthodontists, audiologists, nutritionists, and psychologists. The goal is to restore form and function while supporting emotional health.

Surgical Repair

• Cleft Lip Repair (Cheiloplasty): Typically performed at 3–6 months of age. The surgeon re‑approximates the lip tissues to create a natural contour.
• Cleft Palate Repair (Palatoplasty): Usually done between 9–18 months. The soft palate is closed first, followed by the hard palate, to improve speech and reduce ear infections.
• Alveolar Bone Grafting: Performed around age 7–9, using bone from the hip or synthetic material to close gaps in the gum line, facilitating tooth eruption.
• Secondary Revisions: Additional surgeries may be needed for nasal reshaping, scar revision, or jaw alignment during later childhood or adolescence.

Non‑Surgical & Supportive Care

• Feeding devices: Specialized bottles, nipples, or nasogastric tubes help infants obtain adequate nutrition.
• Speech therapy: Begins after palate closure to correct articulation and resonance issues.
• Hearing management: Placement of tympanostomy tubes (grommets) can prevent chronic ear infections.
• Orthodontic treatment: Braces or expanders guide proper dental alignment.
• Psychosocial support: Counseling, support groups, and family education improve self‑esteem and coping.

Home Care Tips

• Keep the infant’s feeding area clean; change bottles frequently to prevent bacterial growth.
• Use a humidifier if the child has frequent nasal congestion.
• Maintain regular dental visits once teeth erupt.
• Encourage age‑appropriate oral hygiene; gentle brushing around the cleft edges prevents plaque buildup.
• Monitor weight weekly in the first few months; a sudden decline warrants medical review.

Prevention Tips

While many clefts are not preventable, certain actions can lower the risk:

• Folic acid supplementation: 400–800 µg daily beginning at least one month before conception and continuing through the first trimester (CDC recommendation).
• Quit smoking and avoid second‑hand smoke: Seek cessation programs early in pregnancy.
• Limit alcohol intake: Abstaining during the first trimester is safest.
• Control pre‑existing medical conditions: Keep diabetes, hypertension, and thyroid disease well‑managed before conception.
• Review medications with a healthcare provider: Discuss alternatives to known teratogens.
• Vaccinate against rubella: Ensure immunity before pregnancy.
• Good prenatal nutrition: Adequate protein, iron, and vitamin B12 support fetal development.
• Avoid exposure to known environmental pollutants: Use protective equipment when handling chemicals and limit exposure to high‑pesticide areas.

Emergency Warning Signs

Key Take‑aways

Cleft lip and palate are complex birth anomalies that require coordinated, lifelong care. Early recognition, timely surgical repair, and consistent supportive therapies dramatically improve feeding, speech, hearing, dental health, and quality of life. Parents should work closely with a dedicated cranio‑facial team, keep up with scheduled appointments, and seek immediate care if emergency warning signs appear.

References

1. World Health Organization. “Congenital Anomalies.” WHO Fact Sheets, 2023.
2. American Journal of Medical Genetics. “Genetic Architecture of Non‑Syndromic Cleft Lip with or without Cleft Palate.” 2022.
3. Centers for Disease Control and Prevention. “Maternal Smoking and Cleft Lip/Palate.” CDC, 2021.
4. Mayo Clinic. “Cleft Lip and Cleft Palate.” Patient Care & Health Information, 2024.
5. Cleveland Clinic. “Feeding Issues in Babies with Cleft Lip or Palate.” 2023.
6. National Institutes of Health. “Folic Acid and Birth Defects.” NIH Office of Dietary Supplements, 2022.
7. American Speech‑Language‑Hearings Association. “Management of Speech Disorders in Children with Cleft Palate.” 2023.

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