An adolescent athlete may have an avulsion fracture of the anterior superior iliac spine (ASIS) during strenuous exercise.
Clinical features:
(1) adolescent athlete prior to complete ossification of the pelvis
(2) sudden onset of hip pain associated with strenuous exercise
(3) may be preceded by a period of chronic pain consistent with apophysitis
(4) exclusion of alternative diagnoses
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Type
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Cause
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Feature
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at the origin of tensor fascia lata
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swinging a baseball bat
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displaced laterally
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at the origin of the sartorius
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running, sprinting, kicking or jumping
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displaced anteriorly
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variable
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direct trauma
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depends on direction of trauma
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