Rocker bottom foot

A rocker bottom foot (also known as a congenital vertical talus) is a congenital anomaly of the foot. It is characterised by a prominent calcaneus/heel and a convex rounded sole.


It results from a dorsal and lateral dislocation of the talonavicular joint.


Radiographic features

For assessment of the foot alignment abnormalities, it is important to perform weight bearing images or an equivalent in neonates:

  • fixed equinus: plantarflexion of the calcaneus
  • vertical talus: plantarflexion of the talus (increased talocalcaneal angle)
  • irreducible dorsal subluxation or dislocation of the navicular
  • forefoot valgus: divergence of bases of the metatarsal heads on AP and superimposition of the metatarsal bones on the lateral view
  • long axis of the talus passes plantar to metatarsal axis on lateral view and medial to the first metatarsal on AP view

The presence of a rocker bottom foot in an antenatal ultrasound scan is sometimes classified as a soft sign for aneuploidic anomalies 3.

Differential diagnosis

In the antenatal/neonatal period consider clubfoot.

In the adult period consider acquired rocker bottom deformity occurring secondary to:

Edit Article Share Article

Article Information

rID: 13212
Section: Pathology
Synonyms or Alternate Spellings:
  • Rockerbottom feet
  • Rocker bottom feet
  • Congenital vertical talus
  • Congenital convex pes valgus
  • Rockerbottom foot
  • Drag
    Case 1
    Drag here to reorder.
  • Drag
     Case 2
    Drag here to reorder.
  • Drag
    Case 3
    Drag here to reorder.
  • Updating… Please wait.


    Error Unable to process the form. Check for errors and try again.

    Alert_accept Thank you for updating your details.