Anterior superior iliac spine avulsion injury

Anterior superior iliac spine (ASIS) avulsion injuries typically occur in athletes during forceful muscular contraction. ASIS is the site of attachment for sartorius and tensor fascia latae muscles


ASIS avulsion, like other pelvic avulsion injuries, is a stable fracture.

Treatment and prognosis

These can usually be treated on an outpatient basis with crutches, analgesics, and modified activity. Spontaneous recovery usually occurs within 4-to-6 weeks.

Occasionally, surgical intervention is required to remove painful fragments or to regain anatomic fixation.


Article information

rID: 12148
Synonyms or Alternate Spellings:
  • ASIS injury
  • ASIS avulsion injury
  • ASIS avulsion fracture

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Cases and figures

  • Figure 1: insertion points
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  • Case 1
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  • Case 2: annotated
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  • Case 3
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  • Case 4
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  • Case 5: on CT
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  •  Case 6
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  • Case 7
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  • Case 8: on MRI
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