Overview
Open fracture subluxation of the tarsometatarsal (Lisfranc) joint represents a complex injury that often requires meticulous clinical assessment and timely intervention to prevent long-term complications such as chronic instability, arthritis, and functional impairment. This injury is particularly prevalent among athletes, especially dancers, where subtle biomechanical stresses can lead to significant ligamentous and joint disruptions. Early recognition and appropriate management are crucial to ensure optimal recovery and return to activity. The clinical presentation can be subtle, necessitating a thorough examination and imaging to accurately diagnose and guide treatment decisions.
Pathophysiology
The tarsometatarsal joint complex, comprising five joints between the metatarsals and the cuboid and navicular bones, is susceptible to injury due to its critical role in weight-bearing and foot stability. Professional ballet dancers, characterized by repetitive and often asymmetrical loading patterns, exhibit a higher incidence of Lisfranc ligament (LT) tears compared to other athletes, suggesting that these individuals may experience abnormal mechanical stresses on the foot [PMID:27056599]. This increased susceptibility underscores the importance of understanding the specific biomechanical demands placed on the foot in high-impact or specialized activities. The Lisfranc ligament, crucial for maintaining the integrity of the midfoot arch, can become compromised under such conditions, leading to subluxation and instability if not properly managed.
Epidemiology
The epidemiology of Lisfranc injuries highlights a significant disparity between different athletic populations. Studies have shown that dancers have a notably higher frequency of LT tears (55%) compared to other athletes (22%, P=0.001) [PMID:27056599]. This disparity indicates that the nature of dance movements, involving intricate foot positioning and repetitive stress, may predispose dancers to these injuries more frequently than athletes in other sports. The increasing incidence of foot injuries, particularly those involving the tarsometatarsal joint complex, among athletes underscores the need for heightened clinical vigilance and comprehensive diagnostic approaches to identify these often subtle injuries early [PMID:19385569]. Early detection is critical to prevent chronic complications and ensure effective treatment outcomes.
Clinical Presentation
Clinical presentation of Lisfranc injuries can be deceptive, often presenting with nonspecific symptoms that may delay diagnosis. Some patients with LT tears may remain asymptomatic, as evidenced by similar Hip and Groin Outcome Scores (HAGOS) and hip rotation range of motion (ROM) among individuals with varying tear severities [PMID:27056599]. This asymptomatic nature complicates early identification, necessitating a high index of suspicion, especially in high-risk populations like dancers and athletes. Chronic subtle injuries, frequently misdiagnosed or inadequately treated conservatively, may progress to more severe conditions requiring surgical intervention. For instance, cases have been reported where dancers and athletes developed chronic Lisfranc joint instability necessitating surgical repair using techniques such as bone tunnel ligament reconstruction [PMID:26018890]. These interventions often lead to significant functional improvements, as demonstrated by substantial increases in American Orthopaedic Foot & Ankle Society (AOFAS) scores post-surgery.
Diagnosis
Diagnosing Lisfranc injuries accurately requires a multifaceted approach due to the potential for asymptomatic presentations and subtle clinical signs. While MRI is a valuable tool, caution is advised as LT tears can coexist without causing overt symptoms in professional dancers [PMID:27056599]. Therefore, clinical examination remains paramount, complemented by imaging modalities. Bilateral weight-bearing plain radiographs are essential initial investigations, though they may not always reveal subtle disruptions. Advanced imaging techniques, including stress radiographs and MRI, can provide more detailed insights into ligamentous injuries and joint displacement [PMID:19385569]. Stress radiographs, in particular, can help identify subtle diastasis or instability that may not be apparent on standard radiographs, guiding more precise management strategies.
Management
The management of Lisfranc injuries hinges on the severity of the injury, particularly the degree of joint displacement and stability. Injuries characterized by more than 2 mm of displacement or significant instability typically warrant surgical intervention to achieve anatomic reduction and stabilize the joint [PMID:19385569]. Surgical techniques vary based on the specific injury pattern but often include ligament reconstruction methods such as the bone tunnel technique, which has shown promising results in case series involving athletes [PMID:26018890]. In these series, patients experienced significant improvements in functional outcomes, as measured by AOFAS scores, and were able to return to athletic activities within approximately 16.8 weeks post-surgery. For stable sprains with less than 2 mm diastasis, conservative management with immobilization, physical therapy, and gradual weight-bearing may suffice, though close monitoring is essential to prevent chronic instability. Anatomic reduction remains the cornerstone of surgical treatment, aiming to restore the structural integrity of the Lisfranc complex and prevent long-term complications.
Complications
Lisfranc injuries, if not adequately addressed, can lead to several long-term complications. Coexisting pathologies, such as labral tears and cartilage defects in the hip, have been noted in patients with LT tears, suggesting a potential for broader joint degeneration [PMID:27056599]. These findings imply that untreated or inadequately treated Lisfranc injuries might predispose patients to conditions like osteoarthritis, particularly in weight-bearing joints. Chronic instability and persistent pain can significantly impact quality of life and functional capacity, underscoring the importance of thorough initial management and follow-up care to mitigate these risks.
Prognosis & Follow-up
Patients who undergo surgical interventions for Lisfranc ligament reconstruction, such as the bone tunnel technique, often demonstrate sustained clinical improvement over extended follow-up periods, typically exceeding 18 months [PMID:26018890]. These outcomes highlight the potential for successful rehabilitation and return to pre-injury activities when appropriate surgical and rehabilitative measures are employed. Regular follow-up evaluations are crucial to monitor progress, address any residual issues, and ensure that functional recovery aligns with patient expectations. Long-term follow-up should include assessments of joint stability, functional capacity, and patient-reported outcomes to guide further management if necessary.
Key Recommendations
References
1 Mayes S, Ferris AR, Smith P, Garnham A, Cook J. Atraumatic tears of the ligamentum teres are more frequent in professional ballet dancers than a sporting population. Skeletal radiology 2016. link 2 Miyamoto W, Takao M, Innami K, Miki S, Matsushita T. Ligament reconstruction with single bone tunnel technique for chronic symptomatic subtle injury of the Lisfranc joint in athletes. Archives of orthopaedic and trauma surgery 2015. link 3 Myerson MS, Cerrato R. Current management of tarsometatarsal injuries in the athlete. Instructional course lectures 2009. link
3 papers cited of 4 indexed.