Presentation
Injured his right hip during a school rugby match a few months back. Presents with ongoing pain with limitation of motion.
Patient Data
Features consistent with a healing right anterior inferior iliac spine avulsion fracture injury. This is best appreciated on the oblique view.
The bony pelvis is otherwise intact.
Case Discussion
A case of a healing AIIS avulsion fracture injury based on the history of the precipitating incident a few months back. The young rugby player however continued playing through the pain over the period likely delaying his healing.
The AIIS is the origin of the direct head of the rectus femoris muscle which is elongated by hip extension and knee flexion. At the initiation of a kick or explosive sprinting there is abrupt concentric contraction which maximizes tensile strain.
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