Learning objectives
Provide an introduction to pelvic avulsion fractures and discuss the diagnostic and prognostic implications of imaging
Identify the different sites of origins and respective tendons that are involved in pelvic avulsion fractures.
Review the mechanism of injury and multimodality appearance of various types of pelvic avulsion fractures
Learn clinical issues and complications of pelvic avulsion fractures
Background
• Pelvic avulsion fractures are injuries that occur at the tendon or bone at a tendinous insertion site.
They may be due to a single or continuous traumatic myotendinous contraction.
• Avulsion fractures of the pelvis and hip may occur at the iliac crest,anterosuperioriliac spine,
anteroinferior iliac spine,
ischial tuberosity,
pubic ramus,
greater and lesser trochanters.
• These injuries are most common in the adolescent age group and occur in the setting of violent muscular contraction during strenuous physical activity.
Additionally,
avulsion fractures can also...
Imaging findings OR Procedure Details
Ischial tuberosity avulsion fracture
Muscular insertion and Mechanism of injury:
· The semimembranosus,
semitendinosus adductor magnus and the long head of the biceps femoris tendons originate at the ischialtuberosity.
· This is the most common avulsion injury of the pelvis.
The mechanism of avulsion is from a violent contraction of the hamstring muscles,
which is associated with activities such as sprinting,
cheerleading or gymnastics.
Imaging Findings:
• Radiographs demonstrate avulsed fragments.
Large avulsed fragments may cause fibrous union and in some cases open reduction and...
Conclusion
To conclude we aim to educate radiologists on the different types of avulsion fractures and tendons involved,
mechansim of injury ,
radiological presentation and clinical implications of this type of pelvic pathology.
References
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Lower extremity injuries in youth sports.
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• Dixon A.
Apophyseal avulsion fractures of the pelvis and hip | Radiology Reference Article | Radiopaedia.org.
Radiopaediaorg.
2017.
Available at: https://radiopaedia.org/articles/apophyseal-avulsion-fractures-of-the-pelvis-and-hip.
Accessed March 24,
2017.
• Eberl R,
Wegmann H,
Marterer R,
Kraus T,
Sorantin E,
Singer G.
Diagnosis and Treatment of Apophyseal Injuries of the Pelvis in Adolescents.
Seminars in Musculoskeletal Radiology.
2014;18(05):498-504.
doi:10.1055/s-0034-1389267.
• Fernbach S,
Wilkinson R.
Avulsion injuries of the pelvis and proximal femur....