Meary's angle

Meary's angle or lateral talo-first metatarsal angle has been used to identify the apex of deformity in patients with pes cavus and pes planus on lateral weight bearing foot radiographs. It is the angle between a line drawn from the centres of longitudinal axes of the talus and the first metatarsal.

Radiographic features

In the normal weight-bearing foot, the midline axis of the talus is in line with the midline axis of the first metatarsal. Normally Meary's angle is 0º, with abnormal values considered ref required:

  • angle >4º (i.e. convex upward): pes cavus
  • angle >4º  (i.e. convex downward): pes planus

It can also be used to assess the severity of the deformity ref required:

  • mild <15º
  • moderate: 15-30º 
  • severe: 30º
Share article

Article information

rID: 27404
Section: Gamuts
Tags: pm, refs, cases
Synonyms or Alternate Spellings:
  • Lateral talo-first metatarsal angle
  • Talo-first metatarsal angle
  • Talo-1st metatarsal angle
  • Meary angle

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Lateral talo-firs...
    Case 1: Meary's angle
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

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

    Alert accept Thank you for updating your details.