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Review Question - QID 537

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QID 537 (Type "537" in App Search)
A teenage boy injured his hip while competing in a track meet. His radiograph is shown in Figure A. Which of the following muscles is most likely injured?
  • A

Tensor fascia lata

2%

81/3955

Gluteus medius

3%

100/3955

Gluteus minimus

1%

38/3955

Rectus femoris

92%

3657/3955

Biceps femoris

1%

58/3955

  • A

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Adolescent athletes may sustain an avulsion of the anterior inferior iliac spine (AIIS) which is due to the pull of the rectus femoris. Figure A shows a radio-density overlying the right acetabulum which is consistent with a mildly displaced AIIS avulsion in a skeletally immature patient.

The rectus femoris originates at the AIIS and inserts into the patellar tendon as one of the four quadriceps muscles (see illustration A).

Illustration B details the sites for different muscle avulsion injuries around the pelvis which are commonly seen in adolescent athletes.

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