Cleft palate

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"cleft palate"[MeSH Terms] AND management

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Cleft Palate

A cleft palate is a congenital midline defect of the palate resulting from failure of the lateral palatine processes (palatal shelves) to fuse during embryonic development. It is one of the most common craniofacial birth defects.

Epidemiology

Cleft lip with or without cleft palate: ~1 in 1,000 births; more common in males (60-80% of cases)
Cleft palate alone (without cleft lip): ~1 in 2,500 births; more common in females
~7,000 neonates affected per year in the United States
Frequency varies widely among ethnic groups
The Developing Human, Clinically Oriented Embryology, p. 537-543

Embryology

The palate forms in two parts:

Primary palate (anterior, pre-incisive fossa): derived from merging of the medial nasal prominences to form the median palatal process
Secondary palate (posterior, post-incisive fossa): formed by the lateral palatine processes (palatal shelves), which initially project vertically beside the developing tongue, then elevate to a horizontal position and fuse with each other, the nasal septum, and the primary palate

Cleft palate occurs when the lateral palatine processes fail to meet or fuse. Contributing factors include:

Width of the stomodeum
Reduced mobility of the lateral palatine processes
Altered focal degeneration of the palatal epithelium at fusion sites
Multifactorial inheritance (genetic + environmental)

The incisive fossa is the anatomical landmark separating anterior from posterior cleft defects.

The Developing Human, p. 540-544

Classification

Types of cleft palate (from The Developing Human). A = normal; B = cleft uvula; C = unilateral secondary palate cleft; D = bilateral posterior palate cleft; E-H = progressively severe combined clefts.

Type	Location	Cause
Cleft uvula	Uvula only	Mildest form; "fishtail" appearance
Cleft of posterior palate	Posterior to incisive fossa	Failure of lateral palatine processes to fuse with each other and nasal septum
Cleft of anterior palate	Anterior to incisive fossa	Failure to fuse with primary palate
Complete cleft	Entire palate to incisive fossa	Combined failure
Submucous cleft palate (SMCP)	Intact mucosa but underlying muscle/bone dehiscence	Abnormal muscle orientation with intact overlying mucosa

SMCP classic triad: bifid uvula + zona pellucida (hyperlucent midline line on soft palate) + notch at posterior hard palate midline.

Clinical photograph

Infant with unilateral cleft lip and palate (The Developing Human, p. 539)

Anatomy and Pathophysiology

Five muscle pairs contribute to the soft palate. The key abnormalities in cleft palate are:

Levator veli palatini (LVP):

Normal: transverse orientation, creates a muscular sling for the velum - the principal structure for nasopharyngeal closure during speech and swallowing
In cleft: runs in an abnormal anterior-posterior direction, attaching to the posterior aspect of the hard palate instead of forming a midline sling

Tensor veli palatini (TVP):

Normally dilates the Eustachian tube and supports the soft palate
In cleft: thinner, abnormal insertion into the anterior portion of the levator - unable to open the Eustachian tube, leading to chronic middle ear disease

Musculus uvulae:

Increases midline bulk of posterior soft palate during speech
Deficiency (as in SMCP) causes velopharyngeal insufficiency (VPI)
K.J. Lee's Essential Otolaryngology, p. 979-980; Cummings Otolaryngology, p. 3605

Associated Conditions and Complications

Problem	Mechanism
Feeding difficulties	Communication between oral and nasal cavities; inability to generate suction
Otitis media with effusion	TVP dysfunction → Eustachian tube cannot open → chronic middle ear fluid
Velopharyngeal insufficiency (VPI)	Disrupted LVP sling → hypernasal speech, nasal regurgitation
Speech and language delay	VPI + abnormal resonance
Dental/orthodontic problems	Maxillary arch abnormalities, missing/malformed teeth
Midface growth retardation	Inherent growth deficiency + potentially surgery-related
Pierre Robin sequence	Cleft palate + micrognathia + glossoptosis; airway risk

Associated syndromes include velocardiofacial syndrome (22q11 deletion), Stickler syndrome, van der Woude syndrome, and many others - cleft palate may be part of >400 syndromes.

Management - Multidisciplinary Team

Optimal management requires a cleft team including: pediatrician, plastic/craniofacial surgeon, otolaryngologist, speech-language pathologist, orthodontist, dentist, audiologist, geneticist, social worker, and psychologist.

Presurgical Management

Feeding: Specialized nipples (Haberman feeder, Mead Johnson cleft palate nurser); infants are usually fed upright; breastfeeding is difficult but not impossible
Lip taping: Narrows the cleft gap prior to definitive repair; reduces tension at closure
Nasoalveolar molding (NAM): Palatal appliance modified over weeks to narrow the cleft and reshape nasal cartilage; most useful for wide unilateral or bilateral clefts; followed by nostril posts to reposition alar cartilages and elongate the columella
Ear tubes (grommets): Often placed at the time of palatoplasty due to near-universal otitis media with effusion

Surgical Repair - Timing

The timing of palatoplasty is a balance between two competing risks:

Early repair (< 12 months)	Late repair (> 18 months)
Better speech outcomes	Less midface growth inhibition
Higher risk of maxillary growth retardation	Higher rate of articulation errors and VPI

Standard in the USA: repair before 18 months; most done between 6-16 months
Dorf and Curtin showed 10% vs. 86% articulation error rates for repair before vs. after 1 year
Most surgeons target ~12 months of age
Some centers use a staged approach: early soft palate repair + later hard palate closure, to minimize midface growth restriction
K.J. Lee's Essential Otolaryngology, p. 980; Cummings Otolaryngology, p. 3607

Palatoplasty Techniques

Goals of all techniques:

Separate nasal from oral cavity
Restore a functional velopharyngeal valve for speech and swallowing
Preserve midface growth
Reconstruct the levator muscle sling (intravelar veloplasty)

Technique	Description	Best For
Two-flap (Bardach) palatoplasty with intravelar veloplasty	Two mucoperiosteal flaps raised on greater palatine vessels; soft palatal muscles released from hard palate; nasal layer then muscle sling then oral layer closed	Widely used for all palatal clefts
Double-opposing Z-plasty (Furlow palatoplasty)	Opposing Z-plasty incisions on oral and nasal layers transpose myomucosal flaps; reorients levator and lengthens palate	Soft palate clefts, SMCP, also combined with other techniques
Von Langenbeck	Bipedicled mucoperiosteal flaps, no pushback	Narrower clefts
V-Y pushback (Veau-Wardill-Kilner)	Pushes palatal flaps posteriorly; lengthens palate	When more palatal length needed
Schweckendiek (primary veloplasty)	Soft palate only initially; hard palate closed later	Staged approach centers

Cummings Otolaryngology, p. 3608; K.J. Lee's Essential Otolaryngology, p. 980-981

Postoperative Care

Arm restraints to prevent finger insertion into the mouth
Soft/liquid diet for 2-3 weeks
Pain management
Monitor for wound dehiscence and airway issues
Pierre Robin patients: pre-planned airway management with anesthesiology

Secondary Procedures

Velopharyngeal insufficiency: If VPI persists after palatoplasty, options include pharyngeal flap surgery or sphincter pharyngoplasty
Alveolar bone grafting: Typically at age 7-9 (mixed dentition), to provide bone for canine tooth eruption
Orthognathic surgery: Le Fort I osteotomy for significant midface retrusion, typically after skeletal maturity (~17-18 years)
Revision rhinoplasty and lip revision: For cosmetic refinement
Orthodontics: Throughout childhood and adolescence

Genetics and Etiology

Multifactorial inheritance (genetic + environmental) accounts for most non-syndromic cases
IRF6 gene (interferon regulatory factor 6) is involved in isolated cleft formation
Environmental risk factors: maternal smoking, alcohol, folate deficiency, anticonvulsants (phenytoin, valproate), corticosteroids, retinoids
Recurrence risk in a family with one affected child: ~4% for subsequent children

Submucous Cleft Palate

A special variant where the overlying mucosa is intact but:

The levator and other palatal muscles are oriented anterior-posteriorly (not transversely)
There is a bony defect in the hard palate
Classic triad: bifid uvula + zona pellucida + posterior hard palate notch

Management: monitor closely; surgery only if evidence of feeding problems, otologic disease, or VPI.

K.J. Lee's Essential Otolaryngology, p. 980; Cummings Otolaryngology, p. 3609

Recent Evidence (2024-2026)

A 2025 systematic review and meta-analysis (PMID 40394284) examined enhanced recovery after surgery (ERAS) protocols for pediatric cleft lip/palate surgery, supporting their use to optimize perioperative management.
A 2026 umbrella review (PMID 42251739) examined the emerging role of artificial intelligence in cleft diagnosis and detection.
A 2026 systematic review (PMID 42107941) analyzed the effectiveness of different surgical methods for cleft palate repair - these do not contradict established guidelines but continue to refine technique selection.

Sources: The Developing Human: Clinically Oriented Embryology; K.J. Lee's Essential Otolaryngology; Cummings Otolaryngology - Head and Neck Surgery; Bailey and Love's Short Practice of Surgery.

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