Meary's angle

Meary's angle or talus-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.

Measurement

It is the angle between a line drawn from the centers of longitudinal axes of the talus and the first metatarsal.

Interpretation

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 3:

It can also be used to classify the severity of deformity 3:

  • mild <15º
  • moderate: 15-30º 
  • severe: >30º

Article information

rID: 27404
Synonyms or Alternate Spellings:
  • Talus-first metatarsal angle
  • Lateral talo-first metatarsal angle
  • Talo-first metatarsal angle
  • Talo-1st metatarsal angle
  • Meary angle

Support Radiopaedia and see fewer ads

Cases and figures

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

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

     Thank you for updating your details.