Cleft Lip and Palate: Case Discussion & Key Points
Model Case Presentation
Patient Demographics
Name: Baby Ananya, Age: 6 weeks, Gender: Female, Informant: Mother (Reliable)
Chief Complaints
- Visible gap in the upper lip since birth
- Difficulty in feeding — nasal regurgitation of milk — since birth
- Poor weight gain since birth
History Summary
Baby was born at term via NVD. Cleft in the upper lip was noticed immediately at birth. Mother reports that the baby is unable to latch and create adequate suction during breastfeeding. Milk frequently regurgitates through the nose. Baby takes prolonged time to feed, tires easily, and falls asleep before adequate intake. Birth weight was 2.9 kg; current weight at 6 weeks is 3.4 kg (expected ~4.5 kg). No cyanosis, no respiratory distress at rest. No other visible malformations noted.
Antenatal history: Mother was not on any teratogens. No history of rubella, alcohol use, or gestational diabetes. Folic acid supplementation was inadequate (started only in the second trimester). Non-consanguineous marriage. No family history of cleft lip/palate. No previous siblings with clefting.
Examination Summary
| Parameter | Finding | Significance |
|---|---|---|
| Weight | 3.4 kg | Failure to Thrive (expected ~4.5 kg at 6 weeks) |
| RR | 44/min | Normal |
| HR | 136/min | Normal |
| SpO2 | 99% | Normal |
| Temperature | Afebrile | — |
| Lip | Left-sided complete unilateral cleft lip extending into the floor of the nostril | Complete unilateral CL |
| Palate | Left-sided complete cleft of hard and soft palate (Veau Class III) | CLP — primary + secondary palate involved |
| Nose | Left alar base displaced laterally; nasal tip deviated to right | Nasal deformity associated with CL |
| Other systems | Normal | No associated anomalies clinically |
Local Examination: Left-sided complete cleft of the upper lip from the vermilion border extending through the alveolar ridge into the floor of the nostril. On inspection of the oral cavity: a complete left-sided cleft of both the hard and soft palate visible. Uvula bifid. Cupid's bow distorted on cleft side. Orbicularis oris muscle interrupted and inserts aberrantly into the alar base.
✅ Complete Diagnosis
Left-sided Complete Unilateral Cleft Lip and Palate (Veau Class III / LAHSAL notation: L _ _ S A L) — Non-syndromic, with Failure to Thrive due to feeding difficulties.
📝 History — Exam Q&A
Overall, orofacial clefts occur in approximately 1 in 500–550 live births. Incidence varies by ethnicity:
- Asians: ~2 per 1,000 live births (highest)
- Caucasians: ~1 per 1,000 live births
- Africans: ~0.3 per 1,000 live births (lowest)
Cleft lip ± palate (CL/P) is more common in males. Isolated cleft palate (CP alone) is more common in females.
Cleft lip (primary palate):
- Failure of fusion of the medial nasal process with the maxillary process
- Occurs at 5th–7th week of gestation
- Affects the lip, alveolus, and hard palate anterior to the incisive foramen (primary palate)
Cleft palate (secondary palate):
- Failure of fusion of the palatal shelves (horizontal projections of the maxillary processes)
- Occurs at 8th–12th week of gestation
- Affects the hard and/or soft palate posterior to the incisive foramen (secondary palate)
💡 Key Embryology Point
Cleft lip ± palate (CL/P) and isolated cleft palate (CP) are embryologically distinct entities with different timing, genetics, and epidemiology. CL/P involves disruption of primary palate formation; isolated CP involves secondary palate formation only.
Majority (~70%) are non-syndromic with multifactorial inheritance (gene-environment interaction).
Genetic factors:
- Genes implicated: IRF6, MSX1, TBX22, TGF-β2, TGF-α
- Chromosomal: Trisomy 13 (Patau), Trisomy 18, 22q11.2 deletion
Environmental/teratogenic factors:
- Folate deficiency (most important preventable cause)
- Maternal smoking and alcohol
- Drugs: Phenytoin, thalidomide, retinoids (isotretinoin), corticosteroids (1st trimester), methotrexate
- Maternal diabetes, rubella
- Amniotic banding (causes atypical facial clefts)
Cleft lip alone: Relatively mild feeding difficulties. May have trouble maintaining a seal around the nipple but can often breastfeed with positional modifications (lip closure maneuver).
Cleft palate (with or without cleft lip): Severe feeding difficulty because:
- The infant cannot generate adequate negative intraoral pressure (suction) due to nasal–oral communication
- Results in: nasal regurgitation of milk, excessive air swallowing, prolonged feeding, fatigue before adequate intake
- Cannot breastfeed effectively; requires specialized cleft feeding bottles (Haberman feeder, Mead Johnson/Medela cleft palate nurser, Pigeon bottle)
- No stridor or apnea — Rules out Pierre Robin Sequence with airway compromise
- No cyanosis — Rules out associated cardiac defect (22q11.2 deletion has CHD)
- Antenatal drugs: Phenytoin, thalidomide, steroids, retinoids — known teratogens
- Maternal folate: Deficiency increases risk
- Family history: Recurrence risk counseling
- No other anomalies: Distinguishes syndromic from non-syndromic cleft
- No hearing difficulty — Cleft palate causes Eustachian tube dysfunction → conductive hearing loss (important to ask)
| Situation | Recurrence Risk |
|---|---|
| No affected family members (sporadic) | ~1 in 1,000 (general population) |
| One affected sibling (parents unaffected) | ~4% (CL/P); ~3–5% (CP alone) |
| Two affected siblings | ~10–12% |
| One affected parent | ~4% |
| One parent + one sibling affected | ~17% |
| Van der Woude syndrome (AD) | 50% |
| 22q11.2 deletion (AD) | 50% if one parent carries deletion |
~75% of cases are isolated (non-syndromic); ~25% are part of a genetic syndrome.
1. Simple Descriptive Classification:
- Cleft lip alone (CL) — incomplete or complete; unilateral (left > right) or bilateral
- Cleft palate alone (CP) — soft palate only, soft + hard palate, or submucous cleft
- Cleft lip + palate (CLP) — unilateral or bilateral
2. Veau Classification (palate focus):
| Class | Description |
|---|---|
| I | Cleft of soft palate only |
| II | Cleft of hard + soft palate (secondary palate only) |
| III | Complete unilateral cleft of lip, alveolus, and palate |
| IV | Complete bilateral cleft of lip, alveolus, and palate |
3. Davis and Ritchie Classification:
- Group I — Clefts anterior to the alveolus (cleft lip: unilateral, median, bilateral)
- Group II — Postalveolar clefts (palate alone: soft palate, hard + soft, submucous)
- Group III — Alveolar clefts (complete CLP: unilateral or bilateral)
4. LAHSAL System (Kernahan "Striped Y"): A symbolic notation for each anatomical unit — Lip, Alveolus, Hard palate, Soft palate, on each side (Left-Right). Affected segments are marked.
💡 Veau Classification is Most Exam-Relevant
Veau III (complete unilateral CLP) is the most common type encountered in clinical practice and exams. Always specify: left/right, complete/incomplete, and structures involved.
Left side is more commonly affected. Overall ratio: Left : Right : Bilateral = 6 : 3 : 1.
Possible reason: During embryogenesis, the left medial nasal process is slightly delayed in development compared to the right, making it more vulnerable to disruption of fusion.
Pierre Robin Sequence (PRS) is a sequence (not a syndrome) — a series of anomalies triggered by one initiating event:
- Micrognathia (hypoplastic mandible) — the initiating event, occurring by ~10th week
- Glossoptosis — tongue displaced posteriorly/superiorly by the small jaw
- U-shaped cleft palate — tongue physically prevents palatal shelf fusion
- Airway obstruction — glossoptosis causes upper airway obstruction (may be life-threatening)
Key distinction from isolated cleft palate:
- Isolated CP: Palatal shelves fail to fuse; mandible is normal; tongue is normal
- PRS: CP is a consequence of glossoptosis; always accompanied by micrognathia; airway is at risk; always U-shaped
🚨 Emergency Point
A newborn with PRS may have life-threatening airway obstruction. Prone positioning (face-down) allows tongue to fall forward by gravity and relieves obstruction in ~70% of cases. This is a critical first step.
| Syndrome | Key Features | Inheritance |
|---|---|---|
| Van der Woude syndrome (most common AD cleft syndrome) | Cleft lip ± palate + lower lip pits (mucous gland pits) | Autosomal Dominant (IRF6 gene) |
| 22q11.2 Deletion Syndrome (DiGeorge / Velocardiofacial) | Cleft palate, CHD (conotruncal), hypocalcemia, immune deficiency, developmental delay | AD (usually de novo) |
| Stickler Syndrome | CP (often as part of PRS), severe myopia, vitreous abnormality, arthritis, sensorineural hearing loss | AD (COL2A1 gene) |
| Treacher Collins Syndrome | Mandibular hypoplasia, malar hypoplasia, downslanting palpebral fissures, microtia, cleft palate | AD (TCOF1 gene) |
| Trisomy 13 (Patau syndrome) | Median cleft lip, holoprosencephaly, polydactyly, microcephaly — lethal | Chromosomal |
A submucous cleft palate (SMCP) is a hidden defect where the mucosa is intact but the underlying muscle (levator veli palatini) and/or bony palate are deficient. The mucosa covers the defect.
Classic triad of SMCP (Calnan's triad):
- Bifid uvula
- Zona pellucida — translucent midline "blue line" in the soft palate
- Notch in the posterior hard palate (palpable)
Clinical importance: Often missed at birth (mucosa is intact). Presents later with:
- Hypernasal speech / velopharyngeal insufficiency (VPI)
- Recurrent otitis media (Eustachian tube dysfunction)
- Feeding difficulties in infancy (sometimes)
Incidence: ~1 in 1,200. Always examine the palate carefully including palpation and look for bifid uvula.
🩺 Examination — Exam Q&A
Describe systematically:
- Side: Unilateral (left/right) or bilateral
- Extent: Complete (extends from vermilion through alveolus to nasal floor) vs Incomplete (partial gap, nasal floor intact = Simonart's band present)
- Nasal involvement: Alar base displacement, nasal tip deviation, nostril asymmetry
- Associated palate: Is the palate also cleft? (always inspect the oral cavity!)
- Microform: Only a notch in the vermilion border with no frank clefting
💡 Simonart's Band
A narrow bridge of tissue across the cleft at the base of the nostril seen in an incomplete cleft lip. It indicates the cleft does not extend into the nasal floor — important for surgical planning.
Unilateral CL nasal deformity:
- Alar base of cleft side displaced laterally, inferiorly, and posteriorly
- Nasal tip deviated to the non-cleft side
- Columella deviated to non-cleft side
- Lower lateral cartilage (alar cartilage) on cleft side is flattened and malpositioned
Bilateral CL nasal deformity (more severe):
- Prolabium (premaxilla) is anteriorly displaced and prominent
- Short columella — most characteristic feature
- Both alar bases displaced laterally
- Broad, flat nasal tip
After identifying a cleft lip, palate examination is mandatory:
- Inspection: Use a tongue depressor and good light — look for communication between oral and nasal cavities, note the shape (V-shaped = bilateral CLP; U-shaped = isolated CP or PRS)
- Palpation: Run a finger along the hard and soft palate to detect a bony notch at the hard-soft palate junction — identifies submucous cleft
- Uvula: Bifid uvula suggests submucous cleft palate
- Zona pellucida: Translucent midline zone in soft palate — submucous cleft sign
| Shape | Significance |
|---|---|
| V-shaped (narrow, triangular) | Unilateral or bilateral cleft lip + palate (CLP). Alveolus is involved. |
| U-shaped (wide, rounded) | Isolated cleft palate (CP alone) — often associated with Pierre Robin Sequence. Alveolus is NOT involved. |
U-shaped CP is wider because the tongue was in the cleft during development (as in PRS), preventing shelf fusion over a broad area.
- Lower lip pits → Van der Woude syndrome
- Micrognathia + glossoptosis + U-shaped CP → Pierre Robin Sequence (look for associated Stickler syndrome signs: myopia, hearing loss)
- Mandibular hypoplasia + malar hypoplasia + downslanting palpebral fissures + microtia → Treacher Collins syndrome
- CHD + hypocalcemia features + dysmorphic face → 22q11.2 deletion (DiGeorge)
- Microcephaly + median cleft lip + polydactyly → Trisomy 13 (Patau)
- Hypertelorism + frontal bossing → Consider craniosynostosis syndromes
Children with cleft palate have Eustachian tube dysfunction because the tensor veli palatini (which normally opens the Eustachian tube) is abnormally inserted into the medial edges of the cleft rather than into the palate. This causes:
- Recurrent otitis media with effusion (OME / "glue ear") — the most common complication
- Conductive hearing loss — often bilateral
- Chronic otitis media and risk of cholesteatoma (long-term)
Examination: Always check otoscopy — retracted, dull tympanic membranes with fluid levels (OME). Check hearing with BERA (brainstem evoked response audiometry) in neonates.
- Missing, supernumerary, or malformed teeth at the line of the cleft (between lateral incisor and canine)
- Malocclusion:
- Class III (anterior crossbite) — deficient maxillary growth due to scarring from cleft repair
- Class II — common in Pierre Robin (micrognathia)
- Alveolar cleft — gap in the alveolar ridge causes dental arch discontinuity and space between teeth
- Anterior open bite may develop
🔬 Investigations — Exam Q&A
Yes — by ultrasonography.
- Cleft lip: Detectable on routine 20-week anomaly scan (mid-trimester USG). Sensitivity is ~75–80% for cleft lip. Seen as a notch or gap in the upper lip.
- Cleft palate: Much harder to detect antenatally by 2D USG. 3D/4D ultrasound improves detection.
- Landmark sign: An intact uvula appears as an "equals sign" (=) on ultrasound — its absence or disruption suggests palatal cleft.
Importance of antenatal diagnosis: Allows parental counseling, planning multidisciplinary team involvement at birth, genetic testing, and psychological preparation.
- Karyotype / chromosomal microarray: If dysmorphic features or associated anomalies suggest syndromic cause (e.g., trisomy 13, 18)
- FISH / Array CGH for 22q11.2 deletion: If conotruncal CHD, hypocalcemia, immune deficiency, or typical facies
- IRF6 gene sequencing: If lower lip pits present (Van der Woude syndrome)
- COL2A1 gene: If features of Stickler syndrome
- Genetic counseling is recommended for all families
- BERA (Brainstem Evoked Response Audiometry) / ABR (Auditory Brainstem Response): Performed in the neonatal period to establish baseline hearing
- Tympanometry: Performed at each follow-up — detects OME (flat type B tympanogram)
- Pure tone audiometry: From ~4 years of age onwards
- All children with cleft palate should have audiological follow-up at regular intervals due to the high prevalence of OME and conductive hearing loss
- Hemoglobin / CBC: Check for anemia — surgery requires Hb ≥ 10 g/dL ("Rule of Ten" — weight ≥ 10 lb or 4.5 kg; Hb ≥ 10 g/dL; age ≥ 10 weeks)
- Coagulation profile: PT/APTT/INR before surgery
- Blood group and cross-match
- Chest X-ray: Pre-anaesthetic workup
- Echocardiography: If features of associated CHD (particularly 22q11.2 or other syndrome)
- Serum calcium: If 22q11.2 deletion suspected (hypocalcemia pre-operatively is dangerous)
- Photographs: Clinical photography from multiple angles for surgical planning and documentation
VPI is the inability of the soft palate and pharyngeal walls to close off the nasopharynx during speech, resulting in air escaping through the nose. It causes hypernasal speech — a distinctive quality where nasal consonants (n, m, ng) sound normal but oral consonants (p, b, t, d) are poorly articulated.
Assessment:
- Clinical speech assessment by speech-language pathologist — primary evaluation
- Nasometry: Objective measurement of nasal resonance during speech
- Videofluoroscopy: Dynamic real-time assessment of palatal movement during speech (lateral view)
- Nasopharyngoscopy (Nasendoscopy): Direct visualization of velopharyngeal closure — gold standard for surgical planning
💊 Management — Exam Q&A
Management of cleft lip/palate requires a multidisciplinary team (MDT). Core members:
- Plastic/Craniofacial surgeon (primary repair)
- Oral & Maxillofacial surgeon (alveolar bone grafting, orthognathic surgery)
- Orthodontist (dental arch management, presurgical NAM, long-term occlusion)
- Pediatric dentist
- Speech-language pathologist / speech therapist
- ENT surgeon (grommets, hearing management)
- Audiologist
- Pediatrician (overall growth, feeding, nutrition)
- Geneticist (counseling, syndromic evaluation)
- Psychologist / social worker
- Nurse coordinator / patient coordinator
Historically, the "Rule of Tens" (Millard's criteria) was used to determine surgical readiness for cleft lip repair:
- Age ≥ 10 weeks
- Weight ≥ 10 pounds (~4.5 kg)
- Hemoglobin ≥ 10 g/dL
Modern practice: Cleft lip repair is performed at 3–6 months of age, though many centers now perform repair at 3 months. Earlier repair favors better bonding and psychological benefits for parents without significantly increased surgical risk.
💡 Memory Tip
Lip at 3 months, Palate at 9–12 months — the most commonly tested timing rule.
Ideal timing: 9–12 months (before the critical period of speech development, which begins around 12–18 months).
Why timing matters — the trade-off:
- Early repair (< 18 months): Better speech outcomes (palate is intact before babbling and speech acquisition). However, may interfere with mid-facial growth (scar tissue restricts maxillary development → Class III malocclusion).
- Late repair (> 18 months): Better mid-facial growth but poor speech outcomes (hypernasal speech, compensatory articulation patterns established before repair).
Current consensus: Repair by 12 months (before speech onset) to optimize speech while minimizing growth restriction. Most centers aim for 9–12 months.
Goals of cleft lip repair: Restore symmetry of lip height, correct Cupid's bow, reconstruct the orbicularis oris muscle sling, and address nasal deformity.
| Technique | Description | Advantage/Note |
|---|---|---|
| Millard Rotation-Advancement (most common worldwide) | Medial lip segment rotated downward; lateral segment advanced medially. "Cut as you go" principle. C-flap for nasal floor closure. | Most versatile; scar follows philtral column; minimal tissue sacrifice |
| Tennison-Randall Triangular Flap | Geometric Z-plasty principle; triangular flap from lateral lip inserted into a back-cut on medial segment near vermilion. | Reliable, mathematically precise; good for wide clefts; scar crosses mid-philtrum |
| Fisher Anatomic Subunit Repair | Respects the anatomic subunits of the lip; incisions stay within subunit boundaries. | Excellent aesthetic results; more complex technique |
Bilateral cleft lip: Modified Millard technique. The main challenge is managing the anteriorly displaced premaxilla and the short columella. Columella lengthening may be needed later.
Goals: Create a tension-free watertight closure; reconstruct the velopharyngeal muscle sling (levator veli palatini); achieve adequate palatal length for speech.
| Technique | Description | Note |
|---|---|---|
| Von Langenbeck | Two bipedicled mucoperiosteal flaps raised from the hard palate and closed in the midline. No palatal lengthening. | Simple; leaves raw bone areas laterally |
| Wardill-Kilner-Veau (V-Y Pushback) | V-Y advancement flaps pushed posteriorly to lengthen the soft palate. Leaves larger denuded areas anteriorly. | Palatal lengthening; but anterior scarring may restrict growth |
| Furlow Double-Opposing Z-Plasty | Two mirror-image Z-plasties on oral and nasal surfaces of soft palate. Reconstructs the levator muscle sling and lengthens the soft palate. | Excellent speech outcomes; best for soft palate clefts; reduces need for relaxing incisions |
| Bardach Two-Flap Palatoplasty | Two large unipedicled mucoperiosteal flaps based on the greater palatine arteries. | Most common in the US; good for wider clefts |
Nasoalveolar Molding (NAM) is a presurgical infant orthopedic device — a customized intraoral plate (made by the orthodontist) worn from birth until lip surgery.
Purpose:
- Progressively narrows the cleft by bringing alveolar segments together
- Shapes the nasal cartilages with a nasal stent component
- Reduces tension on the surgical closure → better healing, less scarring
- Improves nasal symmetry pre-operatively, reducing need for rhinoplasty
NAM is most effective when started in the first 2 weeks of life (neonatal cartilage is malleable due to maternal estrogen). Must be adjusted every 1–2 weeks by the orthodontist.
In cleft lip + palate, the alveolar ridge (dental arch) has a gap (alveolar cleft) that disrupts dental arch continuity and prevents normal tooth eruption across the cleft.
Secondary alveolar bone grafting is performed to fill this gap with cancellous bone (usually from the iliac crest).
Timing: Mixed dentition phase — just before eruption of the permanent canine tooth into the cleft site, typically at 8–11 years of age (when the canine root is ~½–¾ formed on X-ray). This allows the canine to erupt through the grafted bone normally.
Benefits:
- Provides bony continuity of the alveolar arch
- Supports eruption of permanent teeth
- Closes residual oronasal fistulae
- Provides support for the alar base of the nose
| Age / Stage | Intervention |
|---|---|
| Birth (Neonatal) | Diagnosis, parental counseling, airway assessment (PRS?), hearing screen (BERA), feeding support, genetic counseling, NAM initiated (within 2 weeks ideally) |
| 0–6 months | Feeding management (cleft bottles), nutritional monitoring, ENT review, audiological assessment |
| 3–6 months | Cleft lip repair (cheiloplasty) ± primary rhinoplasty |
| 6–9 months | Grommets/ventilation tube insertion if OME (often done at same time as palate repair) |
| 9–12 months | Cleft palate repair (palatoplasty) |
| 1–5 years | Speech therapy, audiological surveillance, ENT review, orthodontic monitoring |
| 5–7 years | Lip/nose revision if needed; speech assessment; pharyngoplasty for VPI if indicated |
| 8–11 years | Secondary alveolar bone grafting (mixed dentition) |
| 12–18 years | Orthodontic treatment; orthognathic surgery (if mid-face deficiency) after growth completion (girls ~16 yrs, boys ~18 yrs) |
| Adulthood | Final rhinoplasty (definitive), scar revision, psychological support |
Early complications:
- Bleeding, airway compromise post-operatively
- Wound dehiscence
- Infection
Late complications:
- Oronasal fistula — most common late complication; occurs at the junction of hard and soft palate. Causes nasal regurgitation and hypernasal speech. Requires re-operation.
- Velopharyngeal insufficiency (VPI) — hypernasal speech; treated with pharyngoplasty (pharyngeal flap or sphincter pharyngoplasty)
- Mid-facial growth restriction — scarring from hard palate repair restricts maxillary growth → Class III malocclusion (requires orthognathic surgery in adulthood)
- Recurrent OME and hearing loss
Pharyngoplasty is a surgical procedure to correct velopharyngeal insufficiency (VPI) — persistent hypernasal speech after palate repair.
Types:
- Pharyngeal flap (superiorly-based): A flap of posterior pharyngeal wall mucosa is elevated and inset into the soft palate, creating a central partial obstruction. Air and sound still pass through lateral ports. Most commonly performed.
- Sphincter pharyngoplasty (Orticochea): Two myomucosal flaps from the posterior tonsillar pillars are transposed and sutured together on the posterior pharyngeal wall, creating a sphincteric port.
- Posterior pharyngeal wall augmentation: Injection of bulking agents (fat, collagen) — for mild VPI.
Indication: Persistent VPI with hypernasal speech after primary palate repair and adequate speech therapy, typically assessed from age 4–5 years.
Complication to know: Pharyngeal flap can cause obstructive sleep apnea (OSA) due to nasopharyngeal obstruction — important to monitor.
Management is stepwise (escalating):
- Step 1 — Prone positioning: First-line; resolves airway obstruction in ~70% of cases as tongue falls forward by gravity
- Step 2 — Nasopharyngeal airway (NPA): A soft tube passed through the nose to bypass the tongue obstruction; used when prone positioning fails
- Step 3 — Tongue-lip adhesion (glossopexy): Tongue is temporarily sutured to the lower lip; holds tongue forward; released later when mandible grows
- Step 4 — Mandibular distraction osteogenesis: An internal/external distraction device is applied to the mandible, which is cut (osteotomy) and gradually lengthened by activation of the device. Brings tongue forward permanently with new bone formation.
- Step 5 — Tracheostomy: Last resort for severe cases unresponsive to above measures
Feeding is managed with specialized bottles, NG tube if needed. Cleft palate repair is performed at the usual timing (9–12 months) once airway is stable.
🔭 Recent Advances — Exam Q&A
- Nasoalveolar Molding (NAM): Introduced by Grayson et al. (1999). Reshapes alveolus and nasal cartilage pre-operatively using a custom intraoral plate with nasal stents. Reduces need for secondary rhinoplasty and improves surgical outcomes.
- PNAM (Pre-surgical Nasoalveolar Molding): Refined versions allow simultaneous correction of both alveolar and nasal deformity.
- DynaCleft nasal elevator system: Tape-based external nasal molding — simpler alternative to NAM for nasal correction.
- Fisher Anatomic Subunit Repair: Modern technique respecting lip anatomic subunits, producing more naturalistic lip appearance with well-hidden scars.
- Sommerlad Radical Muscle Dissection: Emphasis on meticulous intravelar veloplasty — complete detachment and retroposition of the levator muscle to create a proper muscular sling, dramatically improving speech outcomes.
- 3D imaging and 3D printing: Used for surgical planning; 3D models help surgeons visualize and plan complex repairs; stereophotogrammetry for outcome assessment.
- Virtual surgical planning (VSP): Used in orthognathic surgery planning for mid-face correction in older patients.
- Whole exome/genome sequencing: Identifies novel gene variants in non-syndromic CLP families — improving genetic counseling accuracy
- IRF6 gene (Van der Woude): Better genotype-phenotype correlation established
- Genome-wide association studies (GWAS): Identified multiple new loci for non-syndromic CLP
- Epigenetic factors: Folate deficiency causes hypomethylation affecting IRF6 and other genes — strengthens basis for periconceptional folic acid supplementation in prevention
- Array CGH / chromosomal microarray: Replaces karyotype as first-line for syndromic cleft evaluation — detects copy number variants
- Pre-surgical: Feeding advice; counseling parents on speech development expectations
- Post-repair: Early speech therapy starting from 1–2 years to prevent compensatory articulation errors
- Compensatory articulation: Children with VPI develop abnormal speech patterns (glottal stops, pharyngeal fricatives) to compensate for nasal escape — these require intensive speech therapy even after surgical VPI correction
- Intensive articulation therapy: Modern evidence supports high-intensity, short-burst therapy for compensatory errors (Lee Silverman Voice Treatment principles adapted for children)
- Telespeech therapy: Emerging model allowing remote speech therapy — improving access in low-resource settings
Folate plays a crucial role in neural crest cell migration and facial process fusion during the critical embryological period (weeks 4–10). Deficiency increases clefting risk.
Prevention:
- Periconceptional folic acid supplementation — started at least 1 month before conception and continued through the first trimester
- Standard dose: 0.4–0.8 mg/day for general population
- High-risk women (previous child with NTD or cleft): 4–5 mg/day
- Supported by epidemiological data — but evidence is not as strong as for neural tube defects
⚡ Key Points — Quick Revision
One-Liners for Exam
- Incidence: ~1 in 500–550 live births overall; Asians highest (2/1,000)
- CL/P more common in males; isolated CP more common in females
- Embryology CL: Failure of medial nasal + maxillary process fusion at 5–7 weeks
- Embryology CP: Failure of palatal shelf fusion at 8–12 weeks
- Most common type: Left unilateral complete CLP (left : right : bilateral = 6:3:1)
- Most common AD cleft syndrome: Van der Woude syndrome (IRF6 gene — lower lip pits + CL/P)
- Veau Classification: I=soft palate only; II=hard+soft palate; III=complete unilateral CLP; IV=complete bilateral CLP
- Simonart's band: Tissue bridge at nasal floor in incomplete CL
- U-shaped cleft palate: Pierre Robin Sequence; V-shaped: CLP
- Pierre Robin Sequence: Micrognathia → Glossoptosis → U-shaped CP → Airway obstruction. First Rx: Prone positioning.
- Submucous cleft triad (Calnan's): Bifid uvula + Zona pellucida + Posterior hard palate notch
- Rule of Tens: Age ≥10 weeks, Weight ≥10 lb, Hb ≥10 g/dL — for cleft lip repair
- Lip repair: 3–6 months; Palate repair: 9–12 months
- Millard technique: Most common worldwide; rotation-advancement flap
- Furlow Z-plasty: Best speech outcomes for soft palate repair
- NAM (Nasoalveolar Molding): Presurgical orthopedics; start within 2 weeks of birth
- Alveolar bone graft: Mixed dentition, 8–11 years (before canine eruption)
- VPI: Hypernasal speech after palatoplasty → Pharyngeal flap or Sphincter pharyngoplasty
- Oronasal fistula: Most common late complication of palate repair
- Ear complication: Eustachian tube dysfunction → OME → Conductive hearing loss
- Recurrence risk (1 sibling affected): ~4% for CL/P; ~3–5% for CP
- Prevention: Periconceptional folic acid (0.4–0.8 mg/day from 1 month before conception)
- Gold standard for VPI assessment: Nasopharyngoscopy