Abstract
Stress fractures of the fifth metatarsal are common injuries in athletes. They are high-risk stress fractures that frequently require surgery. These fractures have a unique classification system, and treatment options are largely dependent on classification as well as patient characteristics. The risk of delayed union and nonunion in these fractures is high if misdiagnosed or treated improperly.
The location and blood supply to the fifth metatarsal contribute to its vulnerability to stress injury. The metaphyseal–diaphyseal junction is located at a vascular watershed area, which may potentially limit its healing potential. The stiff ligamentous attachments on the proximal end of the bone create a high-stress area at this same metaphyseal–diaphyseal junction. The combination of poor blood supply and biomechanical factors make this fracture difficult to treat and prone to delayed union, nonunion, and refracture.
In high-level athletes, surgical fixation is commonly required to adequately treat these fractures. An intramedullary screw is the typical implant of choice and has a high success rate for healing. Nonoperative treatment has limited utility in these fractures but may be employed if the diagnosis is made early. Even with appropriate fixation, the refracture rate can reach just over 10 %, highlighting the need for complete radiographic healing and appropriate postoperative rehabilitation prior to return to sport.
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Weller, A., Harner, C.D., Hogan, M.V. (2015). Stress Fractures of the Fifth Metatarsal. In: Miller, T., Kaeding, C. (eds) Stress Fractures in Athletes. Springer, Cham. https://doi.org/10.1007/978-3-319-09238-6_11
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DOI: https://doi.org/10.1007/978-3-319-09238-6_11
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