Introduction: Fractures of tarsal navicular bone are a rare injury. A navicular fracture can occur either in isolation or associated with other bony or ligamentous injuries, depending on the severity and mechanism of trauma at the time of impact. We report a previously undescribed injury combination of navicular fracture with tear of the lateral ankle ligament complex.
Case Report: An 18-year-old professional long jump athlete presented with a history of twisting injury immediately before taking off, while attempting a jump. A detailed clinical examination and radiological assessment with computed tomography (CT) and magnetic resonance imaging (MRI) scan were performed. She was diagnosed to have a navicular body fracture with complete rupture of anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL). Acute fixation of navicular body fracture along with primary repair of ATFL and CFL was done. The final outcome of the patient was good with return to unrestricted physical activities after 4 months.
Conclusion: A new injury combination of navicular fracture along with lateral ankle ligament complex tear is reported in a professional athlete. A high index of clinical suspicion and early detection using CT and MRI scan can identify this rare injury combination. Surgical treatment can result in favorable outcomes.
Keywords: Tarsal navicular bone, fracture, anterior talofibular ligament, calcaneofibular ligament, computed tomography scan, magnetic resonance imaging scan.
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