A Lisfranc injury is an injury to the ligaments and joints of the midfoot, the tarsometatarsal complex, where the long bones of the foot meet the cluster of bones in the middle of the arch. It can happen from a twist of a planted foot or from a direct crush, and it ranges widely, from a subtle ligament sprain to a fracture-dislocation with the midfoot bones shifted out of line.
The most important teaching point is that a Lisfranc injury is easily missed. A subtle one can be mistaken for an ordinary midfoot sprain, yet a missed unstable injury leads to collapse of the arch and midfoot arthritis. For that reason it is taken seriously, evaluated carefully, and stabilized when unstable.
Symptoms
Findings that should raise suspicion include:
- Midfoot pain and swelling after a twist or crush of the foot
- Difficulty or inability to bear weight through the midfoot
- Bruising on the bottom of the midfoot, a suggestive sign
- Pain across the midfoot when it is twisted or loaded
Why it is easily missed, and why that matters
A subtle Lisfranc injury can look like a midfoot sprain on a casual exam and on plain, non-weight-bearing X-rays. The danger is that a missed unstable injury allows the midfoot to shift and collapse, leading to painful midfoot arthritis. That is why persistent midfoot pain, bruising on the sole, and trouble bearing weight after a twist are taken seriously and imaged thoroughly.
How it is diagnosed
Weight-bearing X-rays, often of both feet for comparison, are key, because a subtle instability only shows when the foot is loaded. A CT scan defines fractures, and MRI assesses the ligaments. The goal is to determine whether the midfoot is stable or unstable, because that distinction drives the treatment.
Dr. Lee's first priority is not missing it. A foot with midfoot pain, sole bruising, and trouble bearing weight after a twist is evaluated with weight-bearing imaging to determine whether the injury is stable or unstable, because that is what guides everything.
A stable sprain with no shift is treated without surgery, immobilized and protected until it heals. An unstable injury, where the midfoot has shifted or there is a fracture-dislocation, is treated surgically to realign and stabilize the midfoot, either by fixing the joints in their correct position or by fusing the involved joints. The aim is a stable, well-aligned midfoot that resists arthritis.
Non-surgical treatment
A stable sprain, with no shift on weight-bearing imaging, is treated with:
- Immobilization in a cast or boot
- A period of protected, limited weight-bearing
- Repeat weight-bearing X-rays to confirm it stays aligned
- A graded return to weight-bearing and activity as it heals
Surgical treatment
An unstable Lisfranc injury, where the midfoot has shifted or there is a fracture-dislocation, is treated surgically to realign and stabilize the midfoot. Depending on the injury, this means fixing the joints in their correct position or fusing the involved joints. Restoring and holding the alignment is what protects the midfoot from collapse and arthritis.
Recovery timeline
Recovery is deliberate, because the midfoot must heal aligned:
- Weeks 0 to 6Immobilization and protected weight-bearing, whether treated in a boot or after surgery, while the midfoot heals.
- Weeks 6 to 12Progressive weight-bearing as healing and alignment are confirmed on imaging.
- Months 3 and beyondA graded return to walking distance, then running and sport, as strength and confidence return.
What patients commonly misunderstand
Two things to take seriously:
- A 'midfoot sprain' that won't bear weight deserves a careful look. A subtle Lisfranc injury is easily mistaken for an ordinary sprain. Midfoot pain, bruising on the sole, and difficulty bearing weight after a twist are reasons for weight-bearing imaging rather than waiting it out.
- A missed unstable injury leads to arthritis. The reason Lisfranc injuries are taken so seriously is that an unstable one, if missed, lets the midfoot shift and collapse, causing midfoot arthritis. Identifying and stabilizing it early is what protects the foot.
This page is general educational content authored by Dr. Lee. It is not a substitute for individual medical advice. Every patient's case is different, book a consultation to discuss yours.