congenital vertical talus
Rare foot deformity where the talus is fixed in plantar flexion with dorsal dislocation of the navicular, creating a rigid flatfoot appearance.
Full Definition
Congenital vertical talus, also known as congenital convex pes valgus or rocker-bottom foot, is a severe rigid flatfoot deformity present at birth. The condition is characterized by fixed plantar flexion and vertical orientation of the talus, with irreducible dorsal dislocation of the navicular bone. This creates a rigid, convex plantar surface that resembles the bottom of a rocking chair. The deformity is often associated with neuromuscular conditions, genetic syndromes, or may occur as an isolated anomaly. Unlike flexible flatfoot, the arch never forms and the deformity does not correct with positioning or growth. Treatment typically requires extensive surgical reconstruction involving soft tissue releases and bony corrections to restore normal foot architecture and function.
Usage
Usage note: Often confused with severe flexible flatfoot, but CVT is rigid and present from birth with characteristic radiographic findings.
In Context
- "The newborn was diagnosed with congenital vertical talus based on the characteristic rocker-bottom appearance and rigid deformity." — Birth examination record
- "Surgical reconstruction for congenital vertical talus included extensive soft tissue releases and reduction of the talonavicular joint." — Operative summary