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Pediatric Metacarpal Fractures.
Instructional Course Lectures 2017 Februrary 15
Metacarpal fractures account for 10% to 35% of all pediatric hand fractures. Pediatric metacarpal fractures commonly occur in patients aged 13 to 16 years, with most injuries sustained during sports activities. Pseudoepiphyses can be confused with metacarpal fractures; however, a careful physical examination can help physicians distinguish the two. Thumb metacarpal base fractures that involve the physis warrant special attention. Thumb metacarpal base fractures with lateral metaphyseal fragments and pediatric Bennett fracture variants (Salter-Harris type III and type IV fractures) are unstable and require surgical management. Finger metacarpal base fractures, especially those in young children, are often the result of high-energ y injuries and should increase a physician's concern for compartment syndrome. Metacarpal shaft fractures can result from a simple bending moment; however, they also can result from a rotational force, which may cause finger crossover that will not remodel and requires reduction. Metacarpal neck fractures account for three-fourths of all finger metacarpal fractures, and increasing acceptable alignment of the index finger through the little finger metacarpal necks (10°, 20°, 30°, and 40° across the digits, respectively) is commonly recommended. Metacarpal head fractures are rare intra-articular injuries that require anatomic fixation and may be underappreciated in children because of the complex geometry and largely cartilaginous nature of the metacarpal head.
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