Lisfranc Injury Case Review: Lessons from a Misdiagnosed Midfoot Fracture-Dislocation

Recent Trends in Midfoot Injury Recognition

Over the past decade, awareness of Lisfranc injuries has grown among orthopaedic specialists, yet misdiagnosis rates remain significant in emergency and primary care settings. A pattern emerges in case reviews: subtle fracture-dislocations are often mistaken for simple ankle sprains, delaying appropriate treatment. Recent clinical audits indicate that up to 20% of Lisfranc injuries are initially missed on plain radiographs, especially when weight-bearing views are not obtained. The trend underscores a persistent gap between guideline recommendations and bedside practice, particularly in high-volume urgent care environments.

Background: The Anatomy and Mechanism of Lisfranc Complex Injuries

The Lisfranc joint complex connects the midfoot to the forefoot through a keystone arrangement of tarsometatarsal articulations. A fracture-dislocation in this region typically results from axial loading or twisting forces—common in motor vehicle collisions, falls, and athletic pivoting. The key diagnostic feature is instability of the second tarsometatarsal joint, often accompanied by diastasis between the first and second metatarsal bases.

• The Lisfranc ligament runs from the medial cuneiform to the base of the second metatarsal; disruption can occur without obvious fracture.
• Subtle malalignment may only appear on weight-bearing X-rays or CT scans, yet non-weight-bearing views are frequently used initially.
• Delayed diagnosis can lead to post-traumatic arthritis, chronic pain, and functional disability requiring salvage procedures.

User Concerns: Common Pitfalls in Diagnosis and Management

Patients and clinicians alike face several recurrent challenges when Lisfranc injury is suspected. The following points highlight areas of confusion and risk:

• Overreliance on swelling and bruising – Plantar ecchymosis is a classic sign but not always present; its absence can falsely reassure clinicians.
• Incomplete imaging protocols – Failure to order weight-bearing bilateral views or CT scans when initial X-rays appear normal.
• Misjudging stability – Non-displaced fractures may be treated as stable when occult instability exists, leading to late displacement.
• Delayed referral – Patients are often sent for follow-up only after continued pain, by which time surgical outcomes worsen.

Likely Impact on Clinical Practice and Patient Outcomes

Each misdiagnosed case review reinforces the need for standardized evaluation pathways. The likely impacts of these recurring lessons include:

• Increased adoption of advanced imaging (CT or weight-bearing radiographs) for any midfoot injury with persistent tenderness or inability to bear weight.
• Better patient education about red flags—such as pain when standing or a feeling of instability—so they seek further evaluation if initial care does not resolve symptoms.
• A shift toward earlier operative stabilization for injuries with >2 mm diastasis or any loss of alignment, reducing long-term arthritis rates.
• Implementation of clinical decision rules in emergency departments to prompt specialty consultation for high-energy mechanisms or ambiguous findings.

What to Watch Next

Observers should monitor several developments in the coming months and years:

• Updates to the classification systems for Lisfranc injuries, as newer studies challenge the simplicity of current schemes.
• Outcome data from multicenter registries that track time-to-diagnosis and functional results after primary versus delayed surgery.
• Advances in point-of-care ultrasound for identifying Lisfranc ligament disruption, which may reduce reliance on CT in some settings.
• Revisions to national guidelines for midfoot trauma, particularly regarding mandatory weight-bearing imaging in awake, cooperative patients.

Every missed or delayed Lisfranc diagnosis becomes a learning opportunity. The consistent message from case reviews is that careful mechanism-of-injury history, a high index of suspicion, and appropriate imaging can prevent the progression from a treatable fracture-dislocation to a chronic, disabling condition.