Anterior inferior iliac spine avulsion injury

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~~Avulsion~~ ~~injuries within the pelvis can occur at six main sites.~~ ~~The~~ Anterior inferior iliac spine (AIIS) avulsion injuries isare one of ~~them~~the six main types of pelvic apophyseal avulsion fractures.

Mechanism

The straight head of the rectus femoris ~~muscle~~ muscle originates ~~from~~ from the ~~anterior inferior iliac spine. Forceful~~ AIIS and forceful extension at the hip joint can ~~lead~~ lead to an avulsion injury at this point.

Radiographic features

Plain radiograph

The avulsedbony fragment may not be as obvious on the ~~A-P~~AP radiograph~~. Oblique~~ as on oblique projections ~~are helpful~~.

~~See also~~

~~avulsion~~ ~~injuries~~

-<p><gs id="d09678a6-3a97-4558-bceb-025494dd062c" ginger_software_uiphraseguid="2406a93f-66ee-40f9-895f-24eb74da3993">Avulsion</gs> injuries within the pelvis can occur at six main sites.<strong> The Anterior inferior iliac spine</strong> is one of them<strong>. </strong>The straight head of the <a href="/articles/rectus-femoris-muscle">rectus femoris muscle</a> originates from the anterior inferior iliac spine. Forceful extension <gs id="ec2b2a8a-c6f1-4745-9e49-c1c2b4ee4bf3" ginger_software_uiphraseguid="eb7d2632-e549-4bd4-8e18-b3b26f21be8b">at</gs> the hip joint can lead to an avulsion injury. The <gs id="1c22ff1a-a5c3-47a5-98bb-d84874ff5e01" ginger_software_uiphraseguid="b1663df1-9847-4488-ae7e-1a0ee40ca079">avulsed</gs> <gs id="a669719f-b938-4bfd-8ef9-df5b75977a4a" ginger_software_uiphraseguid="b1663df1-9847-4488-ae7e-1a0ee40ca079">bony</gs> fragment may not be as obvious on the A-P radiograph. Oblique projections are helpful.</p><h4>See also</h4><ul><li><a href="/articles/avulsion-injuries"><gs id="9310d771-fe71-4743-bc18-47de002f8425" ginger_software_uiphraseguid="1219918b-28b5-46e1-9cc5-dce34e9a32ca">avulsion</gs> injuries</a></li></ul>
+<p><strong>Anterior inferior iliac spine (AIIS) avulsion injuries</strong> are one of the six main types of <a href="/articles/apophyseal-avulsion-fractures-of-the-pelvis-and-hip">pelvic apophyseal avulsion fractures</a>. </p><h4>Mechanism</h4><p>The straight head of the <a href="/articles/rectus-femoris-muscle">rectus femoris muscle</a> originates from the AIIS and forceful extension at the <a href="/articles/hip">hip joint</a> can lead to an <a href="/articles/avulsion-injuries">avulsion injury</a> at this point.</p><h4>Radiographic features</h4><h5>Plain radiograph</h5><p>The avulsed bony fragment may not be as obvious on the AP radiograph as on oblique projections.</p>

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