From the case:
Lisfranc joint - normal alignment
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Normal Lisfranc alignment
Case Discussion
Normal Lisfranc alignment:
- Lines of alignment are represented in red and joint lines are represented in yellow.
- Lines 1 and 2 are assessed on the AP view. Lines 3-6 are assessed on the oblique view.
- Lateral border of 1st metatarsal is aligned with lateral border of 1st (medial) cuneiform.
- Medial border of 2nd metatarsal is aligned with medial border of 2nd (intermediate) cuneiform.
- Medial border of the 3rd (lateral) cuneiform should align with medial border of 3rd metatarsal.
- Lateral border of the 3rd (lateral) cuneiform should align with lateral border of 3rd metatarsal.
- Medial border of 4th metatarsal aligned with medial border of cuboid.
- Lateral margin of the 5th metatarsal can project lateral to cuboid by up to 3 mm on oblique.