Focused examination of congenital talipes equinovarus (clubfoot) including the Pirani scoring system, assessment of deformity components, and differentiation of idiopathic from syndromic clubfoot.
Clubfoot examination requires systematic assessment of the four deformity components (CAVE: Cavus, Adductus, Varus, Equinus) and scoring using the Pirani system. Examiners expect you to calculate the Pirani score accurately, understand the Ponseti method principles, and recognize syndromic versus idiopathic clubfoot.
High-Yield Exam Summary
Congenital Talipes Equinovarus (CTEV): A complex 3D deformity with four components (CAVE):
| Component | Location | Description |
|---|---|---|
| Cavus | Forefoot | Increased medial arch, pronated forefoot |
| Adductus | Forefoot/Midfoot | Forefoot points medially |
| Varus | Hindfoot | Heel inverted/turned inward |
| Equinus | Ankle | Fixed plantarflexion (Achilles tightness) |
Incidence: 1 in 1,000 live births M:F Ratio: 2:1 Bilateral: 50%
The Talus is the Key: In clubfoot, the talus is:
Understanding this explains why correction follows CAVE order (supination before pronation/abduction).
With Baby Undressed:
Syndromic Features (look for):
Family History:
1. Cavus (Forefoot):
2. Adductus (Forefoot/Midfoot):
3. Varus (Hindfoot):
4. Equinus (Ankle):
Key Question: How much does the deformity correct with passive manipulation?
Technique:
Cavus:
Adductus/Varus:
Equinus:
Purpose: Quantify severity and guide treatment Range: 0 to 6 (higher = more severe) Components: 3 midfoot signs + 3 hindfoot signs
Each sign scored:
Assess midfoot adductus
0 = Straight border, 0.5 = Mild curve, 1 = Severe curve (kidney-shaped foot)
Degree of forefoot adductus and midfoot involvement
Ability to detect true positives
Ability to exclude false positives
Assess midfoot adductus severity
0 = No crease, 0.5 = Shallow crease, 1 = Deep crease with line change
Severity of adductus - deep crease suggests greater rigidity
Ability to detect true positives
Ability to exclude false positives
Assess navicular position on talus
0 = Fully covered (can't feel), 0.5 = Partially covered, 1 = Fully uncovered (prominent lateral head)
Degree of medial navicular displacement. Uncovered head = severe displacement
Ability to detect true positives
Ability to exclude false positives
Assess hindfoot severity
0 = No crease, 0.5 = Shallow crease, 1 = Deep crease
Severity of equinus and hindfoot rigidity
Ability to detect true positives
Ability to exclude false positives
Assess calcaneal position
0 = Full heel (calcaneus palpable), 0.5 = Moderate emptiness, 1 = Empty heel (calcaneus high)
Degree of equinus - empty heel indicates calcaneus is positioned high
Ability to detect true positives
Ability to exclude false positives
Assess ankle dorsiflexion
0 = Dorsiflexion beyond neutral, 0.5 = Reaches neutral, 1 = Cannot reach neutral (fixed equinus)
Achilles/posterior capsule contracture - determines need for tenotomy
Ability to detect true positives
Ability to exclude false positives
| score | midfoot | hindfoot | interpretation |
|---|---|---|---|
| 0 | 0 | 0 | Normal/Corrected foot |
| 1-2 | 0.5-1 | 0.5-1 | Mild clubfoot, few casts needed |
| 3-4 | 1.5-2 | 1.5-2 | Moderate, typical number of casts |
| 5-6 | 2.5-3 | 2.5-3 | Severe, complex clubfoot |
Using Pirani Score Clinically:
| feature | idiopathic | syndromic |
|---|---|---|
| Rigidity | Usually correctable | More rigid, resistant |
| Other Findings | Isolated deformity | Multiple anomalies |
| Response to Ponseti | Excellent (95%) | Variable, may need surgery |
| Recurrence | Less common with bracing | Higher recurrence rate |
| Examples | Typical clubfoot | Arthrogryposis, myelomeningocele, VACTERL |
Always Examine:
"2-week-old male infant referred from birth notification with right foot deformity."
High-Yield Exam Summary