First intermetatarsal angle

Case contributed by Leonardo Lustosa
Annotated image

1st intermetatarsal angle.

Case Discussion

The 1st intermetatarsal angle or just intermetatarsal angle (IMA) is the angle formed by the intersection of longitudinal axes of the diaphyses of the 1st and 2nd metatarsals.

It is a useful radiographic measurement in the assessment of hallux valgus.

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