Bilateral Anterior Inferior Iliac Spine Avulsion Fractures in an Adolescent with Type I Osteogenesis Imperfecta: A Case Report.

CASE: A 13-year-old boy with known type I osteogenesis imperfecta (OI) presented with bilateral asynchronous anterior inferior iliac spine (AIIS) apophyseal avulsion fractures 6 weeks apart. Each happened while running. These were successfully treated nonoperatively, and he went on to heal. CONCLUSION: Apophyseal avulsion fractures in patients with OI have been reported in the literature around the elbow and knee; however, to the author's knowledge, this is the first report of an AIIS avulsion fracture in a patient with type I OI. The fractures were treated successfully nonoperatively with activity modification and healed well.