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AIIS avulsion injury — MSRA MCQ

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ModerateHip and GroinAIIS avulsion injuryMSRA

A 16-year-old sprinter feels sudden anterior hip pain during acceleration. Radiography shows a small bony fragment displaced from the anterior inferior iliac spine. What is the most likely diagnosis?

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Correct answer: E — Rectus femoris avulsion injury

Adolescent sprinters and kickers can avulse pelvic apophyses during explosive contraction. The anterior inferior iliac spine is the origin of the straight head of rectus femoris. Most minimally displaced injuries are managed conservatively with staged rehabilitation.

Reference: Brukner & Khan