Paeds Vivas · rheumatology-musculoskeletal-and-sports
Angular, rotational and gait variants — branching viva
Branching viva on the common physiologic variants of the growing lower limb: placing the child on the Salenius and Vankka developmental curve, applying the Staheli rotational profile to the three causes of intoeing, separating the physiologic variant observed from the pathologic limb referred for Blount disease or rickets, and counselling the family on the natural history and the no-device rule.
On this page & tools
Target exams
Branching framework
Open with the developmental curve and the one-sentence problem representation. This is a two-year-old with symmetric bowing and intoeing, and both findings sit on the normal developmental curve. State the Salenius and Vankka sequence aloud — the leg is bowed at birth, straightens to neutral around two years, develops physiologic valgus peaking at three to four years, and reaches the adult valgus by seven to eight. Confirm that this child is symmetric, painless, and age-appropriate, and that the intoeing is in the age band for internal tibial torsion. [1] [4]
Branch to the rotational profile. The three causes of intoeing march through the age bands: metatarsus adductus in the infant, internal tibial torsion in the toddler, and femoral anteversion in the preschool and school-age child. Perform the Staheli profile prone: the foot progression angle confirms the intoeing, the negative thigh-foot angle locates the torsion at the tibia, and the hip rotation excludes a femoral cause. The profile places the torsion on the limb in under a minute. [3] [4]
Branch to the red-flag screen. Run the screen on every child: progression after the expected age, asymmetry or unilateral bowing, pain, a fixed or rigid deformity, short stature, dysmorphism, and a delayed walking. This child is negative on every item, and the negative screen is the licence to observe and reassure. A positive screen is the trigger for the radiograph and the referral. [4] [9]
Branch to the management and the no-device rule. The management of the physiologic variant is observation, reassurance, and a safety-net review at six to twelve months. State clearly that no brace, no special shoe, and no orthotic speeds the correction of intoeing, and that the contemporary orthotic literature confirms this. The surgical derotation osteotomy is reserved for the rare severe persistent case in the older child, and the decision is made with the orthopaedic team. [3] [4]
You have read the opening of this viva. The complete unit — every section and its primary-source references — is part of the Paediatrics Fellowship fellowship atlas.
References4Show ledgerHide ledger
- [1]Salenius P, Vankka E. The development of the tibiofemoral angle in children. J Bone Joint Surg Am, 1975.PMID 1112851
- [3]Bruce RW Jr. Torsional and angular deformities. Pediatr Clin North Am, 1996.PMID 8692584
- [4]Sass P, Hassan G. Lower extremity abnormalities in children. Am Fam Physician, 2003.PMID 12924829
- [9]S DMTS, Taqi M, De Leucio A Blount Disease. StatPearls Publishing, 2026.PMID 32809758