✅ Model Answer: • Condition: Bilateral talipes equinovarus (congenital clubfoot).
• CAVE components:
- C – Cavus (high arch – forefoot pronation).
- A – Adductus (forefoot adduction – turned inward).
- V – Varus (heel inversion – turned inward).
- E – Equinus (ankle plantarflexion – toe pointing down).

✅ Model Answer: • Incidence: 1-2 per 1,000 live births (varies by ethnicity).
• Sex ratio: Male:Female = 2:1.
• Bilateral: ~50% of cases.
• Etiology: Multifactorial (genetic + environmental). Strong genetic component – 25% risk in first-degree relatives if one affected.

✅ Model Answer: • Structural clubfoot: Rigid deformity with cavus, adductus, varus, and equinus. Cannot be passively corrected. Requires casting or surgery.
• Positional clubfoot: Flexible, correctable to neutral. No cavus or varus; only adductus of forefoot. Resolves spontaneously or with stretching.

✅ Model Answer: • Ponseti method is the gold standard with >90% success.
• Steps:
1️⃣ Serial casting (weekly): Correct in order: cavus → adductus → varus → equinus. 5-8 casts.
2️⃣ Achilles tenotomy (percutaneous): After 5-8 casts to correct residual equinus (90% patients).
3️⃣ Foot abduction orthosis (Denis Browne bar): 23 hours/day for 3 months, then night use until 4-5 years.

✅ Model Answer: • Definition: A minor procedure to release the tight Achilles tendon, allowing full dorsiflexion.
• Timing: After 5-8 weekly casts when cavus, adductus, and varus are corrected but residual equinus remains (usually at 6-8 weeks of age).
• Technique: Under local anesthesia, a small blade is inserted percutaneously, and the tendon is completely divided.
• Risks: Bleeding, infection, sural nerve injury (rare).

✅ Model Answer: • FAO (Denis Browne bar): A bar connecting two high-top boots, holding feet in external rotation (70°) and dorsiflexion (15-20°).
• Wearing schedule:
- First 3 months: 23 hours/day (full-time).
- Next 2-4 years: Nighttime and nap use (12-14 hours/day).
- Total: Until 4-5 years of age.
• Compliance is critical – non-compliance is the leading cause of relapse.

✅ Model Answer: • Relapse rate: ~10-30% (higher if bracing non-compliant).
• Management:
- Mild relapse (<1 year): Repeat Ponseti casting (3-5 casts) ± repeat tenotomy.
- Moderate relapse (1-2 years): Casting ± tenotomy, then strict bracing.
- Severe or late relapse: Surgical release (posteromedial release) or tendon transfer.

✅ Model Answer: • Idiopathic clubfoot – 80% (isolated).
• Syndromic/associated conditions: Myelomeningocele (spina bifida), arthrogryposis multiplex congenita, amniotic band sequence, trisomy 18/21, neuromuscular disorders.
• Suspect syndromic if: Other anomalies (sacral dimple, hair tuft, dysmorphic facies, cardiac murmur, hypotonia), or clubfoot is very rigid and resistant to casting.

✅ Model Answer: • Excellent prognosis. >90% achieve a functional, plantigrade foot.
• Most children wear normal shoes and participate in sports.
• Some have mild calf atrophy and slightly smaller foot size.
• Small risk of late relapse (up to 20%) – requires repeat casting or surgery.
• With Ponseti, <10% need extensive surgery.

✅ Model Answer: • "Your baby's feet are turned inward and downward due to clubfoot."
• "We will start treatment next week – the Ponseti method with gentle casting. A new cast is placed weekly for 6-8 weeks."
• "In most babies, a small procedure (Achilles tenotomy) is needed at the end of casting."
• "After casting, your baby must wear special boots attached to a bar (brace) for 3 months full-time, then at night until 4-5 years. This is the most important part to prevent relapse."
• "The success rate is over 90% – your child will walk, run, and play without limitations."

✅ Model Answer: • Yes, prenatal diagnosis by ultrasound at 18-22 weeks (PPV ~50-80%).
• Management:
- Detailed fetal anatomy scan to rule out associated anomalies.
- Amniocentesis if other anomalies present.
- Fetal echocardiogram if syndromic suspicion.
- Refer to pediatric orthopedist and neonatology for postnatal planning.
- Reassure parents that prognosis is excellent.

✅ Model Answer: • Options:
1️⃣ Repeat Ponseti casting – often successful for early relapse.
2️⃣ Surgical release – posteromedial release (Turco or McKay).
3️⃣ Tendon transfers – e.g., anterior tibialis tendon transfer.
4️⃣ Osteotomies – for older children with bony deformity.
5️⃣ Ilizarov (external fixation) – for severe or recurrent deformities.

✅ Model Answer: • Inspection: Small, short foot, deep medial skin creases, empty heel, prominent talar head.
• Deformity: Cavus (high arch), forefoot adducted, heel varus, equinus.
• Mobility: Rigid – cannot passively bring foot to neutral.
• Severity scoring: Pirani score (6-point scale) – assesses posterior crease, empty heel, lateral border convexity, medial crease, coverage of lateral talar head, and rigid equinus.

✅ Model Answer: • Routine X-rays are NOT needed for diagnosis in newborns – clinical diagnosis.
• Role of imaging:
- Preoperative assessment before surgical release.
- Evaluate older children with relapse.
- Rule out other bony abnormalities (e.g., vertical talus).
- Typical X-ray findings: Talocalcaneal angle <20°, parallel talus and calcaneus.