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Abstract
The incidence of avulsion fracture of ischial tuberosity is reported to present in 1.4%−4% of hamstring injuries. The injury mechanism is known to be caused by a sudden forceful hip flexion in the extended knee with eccentric load to the hamstrings. Although the majority of hamstring injuries are strains of the muscle, avulsion fracture of ischial tuberosity occurs rarely. In this report, a 13-year-old boy with avulsion fracture of ischial tuberosity is presented. Successful clinical outcome was achieved with careful conservative management. Previous literatures including operative indications are reviewed.
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Fig. 1.
Pelvis outlet radiograph showing avulsion fracture of ischial tuberosity with fragment displacement of 1.5 cm (arrow).
Fig. 2.
(A) Coronal bone window computed tomography showing the 5.0×30.0×5.0 mm sized bony fragment which shaped crescentic (arrow). (B) Axial bony window computed tomography showing the bony fragment displaced inferiorly and laterally (arrowhead).
Fig. 3.
(A) Coronal T2-weighted magnetic resonance image showing displacement of left ischial tuberosity with partial tear of hamstring tendon (arrow). (B) Axial T2-weighted magnetic resonance image showing apophyseal avulsion of ischial tuberosity and acute strain in adductor magnus muscle (arrowhead).
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