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Hallux valgus: first metatarsophalangeal angle

Case contributed by Dr Benoudina Samir
Annotated image

First metatarsophalangeal angle

Case Discussion

The first metatarsophalangeal angle is used for evaluating the presence of a true hallux valgus deformity. It can only be measured on a radiograph performed whilst weightbearing.

It is the angle between the axis of the 1st metatarsal and the axis of the proximal phalanx of the 1st toe.

A normal angle is ≤15°. A greater value indicates hallux valgus.

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Case information

rID: 42447
Published: 20th Jan 2016
Last edited: 12th Nov 2019
Inclusion in quiz mode: Included

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