Vertical Talus

Modern Study Review (AI-Generated)

High-Yield Summary

Congenital Vertical Talus (CVT) is a rare, rigid foot deformity characterized by a fixed dorsal dislocation of the talonavicular joint, resulting in a “rocker-bottom” foot. It represents the severe end of the flatfoot spectrum and is often associated with neuromuscular and syndromic conditions. Early recognition and surgical correction are critical to restore foot alignment, improve function, and prevent long-term disability.

Key Diagnostic Findings

Anatomy

• Talonavicular (TN) joint: Dislocated dorsolaterally; navicular rides on the talar head.
• Calcaneocuboid (CC) joint: May be dorsally subluxed.
• Midfoot and forefoot: Abducted and dorsiflexed relative to the hindfoot.
• Hindfoot: Rigid equinus and valgus deformity.

Clinical Presentation

• Rigid, rocker-bottom foot with a prominent convex plantar surface.
• Hindfoot equinus and valgus deformity.
• Forefoot abducted and dorsiflexed.
• “Persian slipper” appearance on clinical exam.
• Often bilateral and associated with neuromuscular or syndromic diagnoses (e.g., spinal dysraphism, arthrogryposis, cerebral palsy).

Imaging

• Lateral radiograph: Vertical talus with dorsal dislocation of the navicular on the talus.
• AP radiograph: Abducted forefoot and subluxed CC joint.
• Radiographic angles show loss of normal talocalcaneal and talonavicular alignment.

Classification Systems

• No widely used formal classification system; diagnosis is primarily clinical and radiographic.
• Modern imaging (weight-bearing radiographs, ultrasound in infants) aids early diagnosis.

Current Gold Standard Treatment

Non-operative

• No definitive role for conservative management.
• Serial casting may be used as a temporizing measure to stretch soft tissues and improve foot position before surgery.
• Casting alone is insufficient for correction.

Operative

• Early surgical intervention is standard, ideally before walking age to optimize outcomes.
• Single-stage open reduction:
• Posterolateral release including calcaneofibular ligament and Achilles tendon lengthening.
• Open reduction of the talonavicular joint.
• Release of interosseous talocalcaneal ligaments.
• Stabilization with Kirschner wires (K-wires).
• Two-stage procedures may be considered in severe or neglected cases.
• Minimally invasive and arthroscopic techniques are emerging but not yet standard.

Modern Complications & Outcomes

Complications

Outcomes

• Early surgery leads to improved foot alignment, pain relief, and functional ambulation.
• Long-term outcomes depend on associated neuromuscular conditions.
• Goal: pain-free, plantigrade, and functional foot.
• Close follow-up required to monitor growth and detect recurrence.

Classic Clinical Notes

Vertical Talus

Approach to Congenital Vertical Talus

• This is at the extreme spectrum of flatfeet; i.e., the ultimate flatfoot.
• Look for associated conditions: spinal dysraphism, sacral agenesis, arthrogryposis, neurofibromatosis, DDH, CP, polio, SMA, and iatrogenic (overcorrection of a clubfoot).
• Basically, the TN joint is dislocated, with the navicular riding dorsolaterally on the talar head. The calcaneocuboid joint may also be subluxed dorsally – the whole midfoot and forefoot are swung way out into abduction.
• The diagnosis is made by the rigidity of the hindfoot, and the “Persian slipper” appearance.

Treatment

• There is no role for conservative management. Cast them only as a temporizing measure to stretch things out as best as possible prior to operating on them.
• Can do a one or two stage open reduction of the TN and CC joints.

Drennan: single stage

• Posterolateral release (calcaneofibular ligament), release tendoachilles, expose NV bundle, open reduction of TN joint, cut interosseous talocalcaneal ligaments, then K-wire the joint.

Last Updated on January 25, 2026 by orthonet